Vulnerability-Lookup

CVE-2026-20135 (GCVE-0-2026-20135)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:12 – Updated: 2026-09-17 13:40

Title

Cisco Secure Firewall Threat Defense Software TLS 1.3 Denial of Service Vulnerability

Summary

A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper buffer management during the TLS 1.3 connection. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the LINA process to crash, which would cause the device to reload. The reload can happen before or after authentication of the connection.Note: TLS 1.3 connections include both data traffic and user-management traffic.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-17 13:35 UTC

CWE

CWE-415 - Double Free

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

1 product

Vendor	Product	Version	CPE status
Cisco	Cisco Secure Firewall Threat Defense (FTD) Software	Affected: 7.0.0 Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.0.1.1 Affected: 7.0.2 Affected: 7.2.0 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.2.0.1 Affected: 7.0.4 Affected: 7.2.1 Affected: 7.0.5 Affected: 7.3.0 Affected: 7.2.2 Affected: 7.2.3 Affected: 7.3.1 Affected: 7.2.4 Affected: 7.0.6 Affected: 7.2.5 Affected: 7.2.4.1 Affected: 7.3.1.1 Affected: 7.4.0 Affected: 7.0.6.1 Affected: 7.2.5.1 Affected: 7.4.1 Affected: 7.2.6 Affected: 7.0.6.2 Affected: 7.4.1.1 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.3.1.2 Affected: 7.2.8 Affected: 7.6.0 Affected: 7.4.2 Affected: 7.2.8.1 Affected: 7.0.6.3 Affected: 7.4.2.1 Affected: 7.2.9 Affected: 7.0.7 Affected: 7.7.0 Affected: 7.4.2.2 Affected: 7.2.10 Affected: 7.6.1 Affected: 7.4.2.3 Affected: 7.0.8 Affected: 7.6.2 Affected: 7.7.10 Affected: 7.7.11 Affected: 7.0.8.1 Affected: 7.6.2.1 Affected: 7.7.10.1 Affected: 7.4.2.4 Affected: 7.2.10.2 Affected: 7.4.3 Affected: 7.6.4 Affected: 7.4.4 Affected: 7.0.9 Affected: 7.2.11	guessed

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\"affected\", \"version\": \"7.6.2.1\"}, {\"status\": \"affected\", \"version\": \"7.7.10.1\"}, {\"status\": \"affected\", \"version\": \"7.4.2.4\"}, {\"status\": \"affected\", \"version\": \"7.2.10.2\"}, {\"status\": \"affected\", \"version\": \"7.4.3\"}, {\"status\": \"affected\", \"version\": \"7.6.4\"}, {\"status\": \"affected\", \"version\": \"7.4.4\"}, {\"status\": \"affected\", \"version\": \"7.0.9\"}, {\"status\": \"affected\", \"version\": \"7.2.11\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls1.3-dos-dLxwFWgF\", \"name\": \"cisco-sa-ftd-tls1.3-dos-dLxwFWgF\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.\\r\\n\\r\\nThis vulnerability is due to improper buffer management during the TLS 1.3 connection. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the LINA process to crash, which would cause the device to reload. The reload can happen before or after authentication of the connection.Note:\u0026nbsp;TLS 1.3 connections include both data traffic and user-management traffic.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-415\", \"description\": \"Double Free\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-09-16T20:12:09.389Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20135\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-17T13:40:57.832Z\", \"dateReserved\": \"2025-10-08T11:59:15.381Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-09-16T20:12:09.389Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

CERTFR-2026-AVI-1197

Vulnerability from certfr_avis - Published: 2026-09-17 - Updated: 2026-09-17

De multiples vulnérabilités ont été découvertes dans les produits Cisco. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et un déni de service à distance.

Cisco indique que la vulnérabilité CVE-2026-76460 est activement exploitée.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Cisco indique que les versions 3.2 et 3.1 de Identity Services Engine (ISE) ne seront plus supportées à partir du 30 novembre 2027 et n'ont pas reçu de correctif pour les vulnérabilités CVE-2026-20247, CVE-2026-20282, CVE-2026-20300, CVE-2026-76424, CVE-2026-76425, CVE-2026-76426, CVE-2026-76427 et CVE-2026-76428.
La branche 3.0 ne l'est plus depuis le 13 juillet 2025.

Concernant ISE-PIC, l'éditeur indique que ce produit n'est plus commercialisé et que la version 3.4 est la dernière encore maintenue.

Impacted products

Vendor	Product	Description
Cisco	Identity Services Engine	ISE versions antérieures à 3.3 Patch 12
Cisco	Identity Services Engine	ISE versions antérieures à 3.1 Patch 12
Cisco	Adaptive Security Appliance	Adaptive Security Appliance (ASA), se référer au bulletin de sécurité de l'éditeur pour la liste des systèmes affectés (cf. section Documentation)
Cisco	Firewall Management Center	Firewall Management Center (FMC), se référer au bulletin de sécurité de l'éditeur pour la liste des systèmes affectés (cf. section Documentation)
Cisco	Identity Services Engine	ISE versions 3.5 antérieures à 3.5 Patch 4
Cisco	Firewall Threat Defense	Firewall Threat Defense (FTD), se référer au bulletin de sécurité de l'éditeur pour la liste des systèmes affectés (cf. section Documentation)
Cisco	Identity Services Engine	ISE versions 3.2 antérieures à 3.2 Patch 11
Cisco	Identity Services Engine	ISE ou ISE-PIC versions 3.4 antérieures à 3.4 Patch 7

References

Title

Publication Time

Tags

Bulletin de sécurité Cisco cisco-sa-fmc-javarce-y2NypXwk	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-fmc2-multivulns-HXgcqRG	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ise-rce-se7bYU57	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-fmc-sftunn-codex-c3O4Jft2	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ftd-tls1	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ise-sql-inj-3QTKR947	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-asaftd-ikev2cert-dos-uWyc2xtv	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ise-cmd-inj-e2CuZCYZ	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-asaftd-dtls-dos-Kp57HkyO	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-fmcftd-sftun-multivulns-WGVHOrN3	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-hardening-asaftdfmc-uvpPROhN	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-hardening-ndw1-psFvnrg	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-asaftd-eigrp-dos-GOhNejSj	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ise-multi-hrP9jQSQ	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ise-RADIUS-dos-wR3hYPMw	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-fmc-mulivulns-4PsnFwvx	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-hardening-ise-XU5EwX5T	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-asa-ftd-logging-dos-ZXXNesfN	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ise-mult-vul-ymSsTLCc	2026-09-16	vendor-advisory
Bulletin de sécurité Cisco cisco-sa-ISE-ABP-VNSW7Tn5	2026-09-16	vendor-advisory
Support ISE Cisco	-	other

Show details on source website

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{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "ISE versions ant\u00e9rieures \u00e0 3.3 Patch 12",
      "product": {
        "name": "Identity Services Engine",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    },
    {
      "description": "ISE versions ant\u00e9rieures \u00e0 3.1 Patch 12",
      "product": {
        "name": "Identity Services Engine",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    },
    {
      "description": "Adaptive Security Appliance (ASA), se r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour la liste des syst\u00e8mes affect\u00e9s (cf. section Documentation)",
      "product": {
        "name": "Adaptive Security Appliance",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    },
    {
      "description": "Firewall Management Center (FMC), se r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour la liste des syst\u00e8mes affect\u00e9s (cf. section Documentation)",
      "product": {
        "name": "Firewall Management Center",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    },
    {
      "description": "ISE versions 3.5 ant\u00e9rieures \u00e0 3.5 Patch 4",
      "product": {
        "name": "Identity Services Engine",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    },
    {
      "description": "Firewall Threat Defense (FTD), se r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour la liste des syst\u00e8mes affect\u00e9s (cf. section Documentation)",
      "product": {
        "name": "Firewall Threat Defense",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    },
    {
      "description": "ISE versions 3.2 ant\u00e9rieures \u00e0 3.2 Patch 11",
      "product": {
        "name": "Identity Services Engine",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    },
    {
      "description": "ISE ou ISE-PIC versions 3.4 ant\u00e9rieures \u00e0 3.4 Patch 7",
      "product": {
        "name": "Identity Services Engine",
        "vendor": {
          "name": "Cisco",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "Cisco indique que les versions 3.2 et 3.1 de Identity Services Engine (ISE) ne seront plus support\u00e9es \u00e0 partir du 30 novembre 2027 et n\u0027ont pas re\u00e7u de correctif pour les vuln\u00e9rabilit\u00e9s CVE-2026-20247, CVE-2026-20282, CVE-2026-20300, CVE-2026-76424, CVE-2026-76425, CVE-2026-76426, CVE-2026-76427 et CVE-2026-76428.\u003cbr\u003e\nLa branche 3.0 ne l\u0027est plus depuis le 13 juillet 2025.\n\nConcernant ISE-PIC, l\u0027\u00e9diteur indique que ce produit n\u0027est plus commercialis\u00e9 et que la version 3.4 est la derni\u00e8re encore maintenue.",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-20341",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20341"
    },
    {
      "name": "CVE-2026-20283",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20283"
    },
    {
      "name": "CVE-2026-20234",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20234"
    },
    {
      "name": "CVE-2026-20287",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20287"
    },
    {
      "name": "CVE-2026-20295",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20295"
    },
    {
      "name": "CVE-2026-20329",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20329"
    },
    {
      "name": "CVE-2026-20306",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20306"
    },
    {
      "name": "CVE-2026-20334",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20334"
    },
    {
      "name": "CVE-2026-20130",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20130"
    },
    {
      "name": "CVE-2026-20322",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20322"
    },
    {
      "name": "CVE-2026-76423",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76423"
    },
    {
      "name": "CVE-2026-20135",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20135"
    },
    {
      "name": "CVE-2026-20333",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20333"
    },
    {
      "name": "CVE-2026-76420",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76420"
    },
    {
      "name": "CVE-2026-20237",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20237"
    },
    {
      "name": "CVE-2026-20282",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20282"
    },
    {
      "name": "CVE-2026-20154",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20154"
    },
    {
      "name": "CVE-2026-20211",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20211"
    },
    {
      "name": "CVE-2026-76413",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76413"
    },
    {
      "name": "CVE-2026-20300",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20300"
    },
    {
      "name": "CVE-2026-20305",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20305"
    },
    {
      "name": "CVE-2026-76425",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76425"
    },
    {
      "name": "CVE-2026-20242",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20242"
    },
    {
      "name": "CVE-2026-20326",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20326"
    },
    {
      "name": "CVE-2026-20342",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20342"
    },
    {
      "name": "CVE-2026-20284",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20284"
    },
    {
      "name": "CVE-2026-20325",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20325"
    },
    {
      "name": "CVE-2026-76460",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76460"
    },
    {
      "name": "CVE-2026-20360",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20360"
    },
    {
      "name": "CVE-2026-20335",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20335"
    },
    {
      "name": "CVE-2026-20222",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20222"
    },
    {
      "name": "CVE-2026-76409",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76409"
    },
    {
      "name": "CVE-2026-20340",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20340"
    },
    {
      "name": "CVE-2026-20332",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20332"
    },
    {
      "name": "CVE-2026-76412",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76412"
    },
    {
      "name": "CVE-2026-20307",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20307"
    },
    {
      "name": "CVE-2026-20324",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20324"
    },
    {
      "name": "CVE-2026-20361",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20361"
    },
    {
      "name": "CVE-2026-76427",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76427"
    },
    {
      "name": "CVE-2026-20194",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20194"
    },
    {
      "name": "CVE-2026-20343",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20343"
    },
    {
      "name": "CVE-2026-20344",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20344"
    },
    {
      "name": "CVE-2026-20323",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20323"
    },
    {
      "name": "CVE-2026-20331",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20331"
    },
    {
      "name": "CVE-2026-20250",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20250"
    },
    {
      "name": "CVE-2026-20176",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20176"
    },
    {
      "name": "CVE-2026-76428",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76428"
    },
    {
      "name": "CVE-2026-20247",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20247"
    },
    {
      "name": "CVE-2026-20330",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20330"
    },
    {
      "name": "CVE-2026-20192",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20192"
    },
    {
      "name": "CVE-2026-20336",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20336"
    },
    {
      "name": "CVE-2026-76424",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76424"
    },
    {
      "name": "CVE-2026-20352",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20352"
    },
    {
      "name": "CVE-2026-76426",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-76426"
    },
    {
      "name": "CVE-2026-20249",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-20249"
    }
  ],
  "initial_release_date": "2026-09-17T00:00:00",
  "last_revision_date": "2026-09-17T00:00:00",
  "links": [
    {
      "title": "Support ISE Cisco",
      "url": "https://www.cisco.com/c/en/us/support/security/identity-services-engine/series.html"
    }
  ],
  "reference": "CERTFR-2026-AVI-1197",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-09-17T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service \u00e0 distance"
    },
    {
      "description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
    },
    {
      "description": "Atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es"
    },
    {
      "description": "Injection SQL (SQLi)"
    },
    {
      "description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
    },
    {
      "description": "Contournement de la politique de s\u00e9curit\u00e9"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    },
    {
      "description": "\u00c9l\u00e9vation de privil\u00e8ges"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans les produits Cisco. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance, une \u00e9l\u00e9vation de privil\u00e8ges et un d\u00e9ni de service \u00e0 distance.\n\nCisco indique que la vuln\u00e9rabilit\u00e9 CVE-2026-76460 est activement exploit\u00e9e.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans les produits Cisco",
  "vendor_advisories": [
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-fmc-javarce-y2NypXwk",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-javarce-y2NypXwk"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-fmc2-multivulns-HXgcqRG",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc2-multivulns-HXgcqRG"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ise-rce-se7bYU57",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-rce-se7bYU57"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-fmc-sftunn-codex-c3O4Jft2",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-sftunn-codex-c3O4Jft2"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ftd-tls1",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls1.3-dos-dLxwFWgF"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ise-sql-inj-3QTKR947",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-sql-inj-3QTKR947"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-asaftd-ikev2cert-dos-uWyc2xtv",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2cert-dos-uWyc2xtv"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ise-cmd-inj-e2CuZCYZ",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-cmd-inj-e2CuZCYZ"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-asaftd-dtls-dos-Kp57HkyO",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dtls-dos-Kp57HkyO"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-fmcftd-sftun-multivulns-WGVHOrN3",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmcftd-sftun-multivulns-WGVHOrN3"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-hardening-asaftdfmc-uvpPROhN",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-asaftdfmc-uvpPROhN"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-hardening-ndw1-psFvnrg",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-ndw1-psFvnrg"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-asaftd-eigrp-dos-GOhNejSj",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-eigrp-dos-GOhNejSj"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ise-multi-hrP9jQSQ",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-hrP9jQSQ"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ise-RADIUS-dos-wR3hYPMw",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-RADIUS-dos-wR3hYPMw"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-fmc-mulivulns-4PsnFwvx",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-mulivulns-4PsnFwvx"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-hardening-ise-XU5EwX5T",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-ise-XU5EwX5T"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-asa-ftd-logging-dos-ZXXNesfN",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-logging-dos-ZXXNesfN"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ise-mult-vul-ymSsTLCc",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-mult-vul-ymSsTLCc"
    },
    {
      "published_at": "2026-09-16",
      "title": "Bulletin de s\u00e9curit\u00e9 Cisco cisco-sa-ISE-ABP-VNSW7Tn5",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ISE-ABP-VNSW7Tn5"
    }
  ]
}

FKIE_CVE-2026-20135

Vulnerability from fkie_nvd - Published: 2026-09-16 21:17 - Updated: 2026-09-17 14:17

Severity

8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Summary

References

	URL	Tags
	psirt@cisco.com	https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls1.3-dos-dLxwFWgF

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "7.0.0"
            },
            {
              "status": "affected",
              "version": "7.0.0.1"
            },
            {
              "status": "affected",
              "version": "7.0.1"
            },
            {
              "status": "affected",
              "version": "7.0.1.1"
            },
            {
              "status": "affected",
              "version": "7.0.2"
            },
            {
              "status": "affected",
              "version": "7.2.0"
            },
            {
              "status": "affected",
              "version": "7.0.2.1"
            },
            {
              "status": "affected",
              "version": "7.0.3"
            },
            {
              "status": "affected",
              "version": "7.2.0.1"
            },
            {
              "status": "affected",
              "version": "7.0.4"
            },
            {
              "status": "affected",
              "version": "7.2.1"
            },
            {
              "status": "affected",
              "version": "7.0.5"
            },
            {
              "status": "affected",
              "version": "7.3.0"
            },
            {
              "status": "affected",
              "version": "7.2.2"
            },
            {
              "status": "affected",
              "version": "7.2.3"
            },
            {
              "status": "affected",
              "version": "7.3.1"
            },
            {
              "status": "affected",
              "version": "7.2.4"
            },
            {
              "status": "affected",
              "version": "7.0.6"
            },
            {
              "status": "affected",
              "version": "7.2.5"
            },
            {
              "status": "affected",
              "version": "7.2.4.1"
            },
            {
              "status": "affected",
              "version": "7.3.1.1"
            },
            {
              "status": "affected",
              "version": "7.4.0"
            },
            {
              "status": "affected",
              "version": "7.0.6.1"
            },
            {
              "status": "affected",
              "version": "7.2.5.1"
            },
            {
              "status": "affected",
              "version": "7.4.1"
            },
            {
              "status": "affected",
              "version": "7.2.6"
            },
            {
              "status": "affected",
              "version": "7.0.6.2"
            },
            {
              "status": "affected",
              "version": "7.4.1.1"
            },
            {
              "status": "affected",
              "version": "7.2.7"
            },
            {
              "status": "affected",
              "version": "7.2.5.2"
            },
            {
              "status": "affected",
              "version": "7.3.1.2"
            },
            {
              "status": "affected",
              "version": "7.2.8"
            },
            {
              "status": "affected",
              "version": "7.6.0"
            },
            {
              "status": "affected",
              "version": "7.4.2"
            },
            {
              "status": "affected",
              "version": "7.2.8.1"
            },
            {
              "status": "affected",
              "version": "7.0.6.3"
            },
            {
              "status": "affected",
              "version": "7.4.2.1"
            },
            {
              "status": "affected",
              "version": "7.2.9"
            },
            {
              "status": "affected",
              "version": "7.0.7"
            },
            {
              "status": "affected",
              "version": "7.7.0"
            },
            {
              "status": "affected",
              "version": "7.4.2.2"
            },
            {
              "status": "affected",
              "version": "7.2.10"
            },
            {
              "status": "affected",
              "version": "7.6.1"
            },
            {
              "status": "affected",
              "version": "7.4.2.3"
            },
            {
              "status": "affected",
              "version": "7.0.8"
            },
            {
              "status": "affected",
              "version": "7.6.2"
            },
            {
              "status": "affected",
              "version": "7.7.10"
            },
            {
              "status": "affected",
              "version": "7.7.11"
            },
            {
              "status": "affected",
              "version": "7.0.8.1"
            },
            {
              "status": "affected",
              "version": "7.6.2.1"
            },
            {
              "status": "affected",
              "version": "7.7.10.1"
            },
            {
              "status": "affected",
              "version": "7.4.2.4"
            },
            {
              "status": "affected",
              "version": "7.2.10.2"
            },
            {
              "status": "affected",
              "version": "7.4.3"
            },
            {
              "status": "affected",
              "version": "7.6.4"
            },
            {
              "status": "affected",
              "version": "7.4.4"
            },
            {
              "status": "affected",
              "version": "7.0.9"
            },
            {
              "status": "affected",
              "version": "7.2.11"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to improper buffer management during the TLS 1.3 connection. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the LINA process to crash, which would cause the device to reload. The reload can happen before or after authentication of the connection.Note:\u0026nbsp;TLS 1.3 connections include both data traffic and user-management traffic."
    }
  ],
  "id": "CVE-2026-20135",
  "lastModified": "2026-09-17T14:17:12.670",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20135",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-17T13:35:03.490455Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-16T21:17:07.587",
  "references": [
    {
      "source": "psirt@cisco.com",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls1.3-dos-dLxwFWgF"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    }
  ]
}

GHSA-6F7G-R5WW-W353

Vulnerability from github – Published: 2026-09-16 21:32 – Updated: 2026-09-16 21:32

Details

This vulnerability is due to improper buffer management during the TLS 1.3 connection. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the LINA process to crash, which would cause the device to reload. The reload can happen before or after authentication of the connection.Note: TLS 1.3 connections include both data traffic and user-management traffic.

Severity

8.6 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-20135"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T21:17:07Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.\n\nThis vulnerability is due to improper buffer management during the TLS 1.3 connection. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the LINA process to crash, which would cause the device to reload. The reload can happen before or after authentication of the connection.Note:\u0026nbsp;TLS 1.3 connections include both data traffic and user-management traffic.",
  "id": "GHSA-6f7g-r5ww-w353",
  "modified": "2026-09-16T21:32:48Z",
  "published": "2026-09-16T21:32:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20135"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls1.3-dos-dLxwFWgF"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-20135 (GCVE-0-2026-20135)

CERTFR-2026-AVI-1197

Solutions

FKIE_CVE-2026-20135

GHSA-6F7G-R5WW-W353

Tags

Sightings

Nomenclature

Related by attack behaviour