CVE-2026-20005 (GCVE-0-2026-20005)

Vulnerability from cvelistv5 – Published: 2026-03-04 17:02 – Updated: 2026-03-04 18:04
VLAI
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-392 - Missing Report of Error Condition
Assigner
Impacted products
Vendor Product Version
Cisco Cisco Secure Firewall Threat Defense (FTD) Software Affected: 7.6.0
Affected: 7.6.1
Affected: 7.6.2
Affected: 7.6.2.1
Affected: 7.7.0
Affected: 7.7.10
Affected: 7.7.10.1
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Cisco Cisco Cyber Vision Affected: 3.0.4
Affected: 3.0.0
Affected: 3.0.1
Affected: 3.0.2
Affected: 3.0.3
Affected: 3.0.5
Affected: 3.0.6
Affected: 3.1.0
Affected: 3.1.2
Affected: 3.1.1
Affected: 3.2.3
Affected: 3.2.1
Affected: 3.2.4
Affected: 3.2.0
Affected: 3.2.2
Affected: 4.0.0
Affected: 4.0.1
Affected: 4.0.2
Affected: 4.0.3
Affected: 4.1.0
Affected: 4.1.1
Affected: 4.1.2
Affected: 4.1.3
Affected: 4.1.4
Affected: 4.1.5
Affected: 4.1.6
Affected: 4.1.7
Affected: 4.2.0
Affected: 4.2.1
Affected: 4.2.4
Affected: 4.2.6
Affected: 4.2.2
Affected: 4.2.3
Affected: 4.3.0
Affected: 4.3.1
Affected: 4.3.2
Affected: 4.3.3
Affected: 4.4.0
Affected: 4.4.1
Affected: 4.4.2
Affected: 4.4.3
Affected: 5.0.0
Affected: 5.0.1
Affected: 5.0.2
Affected: 5.1.1
Affected: 5.1.2
Affected: 5.1.3
Affected: 5.2.0
Affected: 5.2.1
Affected: 5.3.0
Affected: 5.3.1
Affected: 5.3.2
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Cisco Cisco UTD SNORT IPS Engine Software Affected: 17.2.1r
Affected: 17.3.1a
Affected: 17.3.2
Affected: 17.3.3
Affected: 17.3.4a
Affected: 17.3.6
Affected: 17.3.5
Affected: 17.3.7
Affected: 17.3.8
Affected: 17.4.1a
Affected: 17.4.2
Affected: 17.4.1b
Affected: 17.5.1a
Affected: 17.6.1a
Affected: 17.6.2
Affected: 17.6.3a
Affected: 17.6.4
Affected: 17.6.5
Affected: 17.6.6
Affected: 17.6.7
Affected: 17.6.8a
Affected: 17.7.1a
Affected: 17.7.2
Affected: 17.10.1a
Affected: 17.9.1a
Affected: 17.9.2a
Affected: 17.9.3a
Affected: 17.9.4
Affected: 17.9.5a
Affected: 17.9.6
Affected: 17.9.5e
Affected: 17.9.5f
Affected: 17.9.7a
Affected: 17.9.8
Affected: 17.9.7b
Affected: 17.8.1a
Affected: 17.11.1a
Affected: 17.12.1a
Affected: 17.12.2
Affected: 17.12.3
Affected: 17.12.4
Affected: 17.12.4a
Affected: 17.12.4b
Affected: 17.12.5
Affected: 17.12.5a
Affected: 17.12.5b
Affected: 17.12.5c
Affected: 17.12.6
Affected: 17.12.5d
Affected: 17.13.1a
Affected: 17.14.1a
Affected: 17.15.1a
Affected: 17.15.2a
Affected: 17.15.2c
Affected: 17.15.3
Affected: 17.15.3a
Affected: 17.15.4
Affected: 17.15.4c
Affected: 17.16.1a
Affected: 17.17.1
Affected: 17.18.1a
Affected: 17.18.2
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Show details on NVD website

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            {
              "status": "affected",
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            {
              "status": "affected",
              "version": "4.2.1"
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            {
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              "version": "4.2.4"
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            {
              "status": "affected",
              "version": "4.2.6"
            },
            {
              "status": "affected",
              "version": "4.2.2"
            },
            {
              "status": "affected",
              "version": "4.2.3"
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            {
              "status": "affected",
              "version": "4.3.0"
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            {
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            {
              "status": "affected",
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              "status": "affected",
              "version": "5.3.1"
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              "status": "affected",
              "version": "5.3.2"
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              "status": "affected",
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              "status": "affected",
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            {
              "status": "affected",
              "version": "17.3.2"
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            {
              "status": "affected",
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          "lang": "en",
          "value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\r\n\r This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
        }
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "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:L",
            "version": "3.1"
          },
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        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
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      "references": [
        {
          "name": "cisco-sa-snort3-multi-dos-XFWkWSwz",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz"
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        "defects": [
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          "CSCwp99280",
          "CSCwo93208"
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    "assignerShortName": "cisco",
    "cveId": "CVE-2026-20005",
    "datePublished": "2026-03-04T17:02:45.919Z",
    "dateReserved": "2025-10-08T11:59:15.349Z",
    "dateUpdated": "2026-03-04T18:04:14.731Z",
    "state": "PUBLISHED"
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A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.\"},{\"lang\":\"es\",\"value\":\"M\u00faltiples productos Cisco est\u00e1n afectados por una vulnerabilidad en el motor de detecci\u00f3n Snort 3 que podr\u00eda permitir a un atacante remoto no autenticado provocar el reinicio del motor de detecci\u00f3n Snort 3, lo que resultar\u00eda en una interrupci\u00f3n de la inspecci\u00f3n de paquetes. Esta vulnerabilidad se debe a un an\u00e1lisis incompleto de los paquetes de entrada de handshake SSL. Un atacante podr\u00eda explotar esta vulnerabilidad enviando paquetes de handshake SSL manipulados. Un exploit exitoso podr\u00eda permitir al atacante provocar una condici\u00f3n de denegaci\u00f3n de servicio (DoS) cuando el motor de detecci\u00f3n Snort 3 se reinicia inesperadamente.\"}],\"affected\":[{\"source\":\"psirt@cisco.com\",\"affectedData\":[{\"vendor\":\"Cisco\",\"product\":\"Cisco Secure Firewall Threat Defense (FTD) Software\",\"versions\":[{\"version\":\"7.6.0\",\"status\":\"affected\"},{\"version\":\"7.6.1\",\"status\":\"affected\"},{\"version\":\"7.6.2\",\"status\":\"affected\"},{\"version\":\"7.6.2.1\",\"status\":\"affected\"},{\"version\":\"7.7.0\",\"status\":\"affected\"},{\"version\":\"7.7.10\",\"status\":\"affected\"},{\"version\":\"7.7.10.1\",\"status\":\"affected\"}]},{\"vendor\":\"Cisco\",\"product\":\"Cisco Cyber 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UTD SNORT IPS Engine Software\",\"versions\":[{\"version\":\"17.2.1r\",\"status\":\"affected\"},{\"version\":\"17.3.1a\",\"status\":\"affected\"},{\"version\":\"17.3.2\",\"status\":\"affected\"},{\"version\":\"17.3.3\",\"status\":\"affected\"},{\"version\":\"17.3.4a\",\"status\":\"affected\"},{\"version\":\"17.3.6\",\"status\":\"affected\"},{\"version\":\"17.3.5\",\"status\":\"affected\"},{\"version\":\"17.3.7\",\"status\":\"affected\"},{\"version\":\"17.3.8\",\"status\":\"affected\"},{\"version\":\"17.4.1a\",\"status\":\"affected\"},{\"version\":\"17.4.2\",\"status\":\"affected\"},{\"version\":\"17.4.1b\",\"status\":\"affected\"},{\"version\":\"17.5.1a\",\"status\":\"affected\"},{\"version\":\"17.6.1a\",\"status\":\"affected\"},{\"version\":\"17.6.2\",\"status\":\"affected\"},{\"version\":\"17.6.3a\",\"status\":\"affected\"},{\"version\":\"17.6.4\",\"status\":\"affected\"},{\"version\":\"17.6.5\",\"status\":\"affected\"},{\"version\":\"17.6.6\",\"status\":\"affected\"},{\"version\":\"17.6.7\",\"status\":\"affected\"},{\"version\":\"17.6.8a\",\"status\":\"affected\"},{\"version\":\"17.7.1a\",\"status\":\"affected\"},{\"version\":\"17.7.2\",\"status\":\"affected\"},{\"version\":\"17.10.1a\",\"status\":\"affected\"},{\"version\":\"17.9.1a\",\"status\":\"affected\"},{\"version\":\"17.9.2a\",\"status\":\"affected\"},{\"version\":\"17.9.3a\",\"status\":\"affected\"},{\"version\":\"17.9.4\",\"status\":\"affected\"},{\"version\":\"17.9.5a\",\"status\":\"affected\"},{\"version\":\"17.9.6\",\"status\":\"affected\"},{\"version\":\"17.9.5e\",\"status\":\"affected\"},{\"version\":\"17.9.5f\",\"status\":\"affected\"},{\"version\":\"17.9.7a\",\"status\":\"affected\"},{\"version\":\"17.9.8\",\"status\":\"affected\"},{\"version\":\"17.9.7b\",\"status\":\"affected\"},{\"version\":\"17.8.1a\",\"status\":\"affected\"},{\"version\":\"17.11.1a\",\"status\":\"affected\"},{\"version\":\"17.12.1a\",\"status\":\"affected\"},{\"version\":\"17.12.2\",\"status\":\"affected\"},{\"version\":\"17.12.3\",\"status\":\"affected\"},{\"version\":\"17.12.4\",\"status\":\"affected\"},{\"version\":\"17.12.4a\",\"status\":\"affected\"},{\"version\":\"17.12.4b\",\"status\":\"affected\"},{\"version\":\"17.12.5\",\"status\":\"affected\"},{\"version\":\"17.12.5a\",\"status\":\"affected\"},{\"version\":\"17.12.5b\",\"status\":\"affected\"},{\"version\":\"17.12.5c\",\"status\":\"affected\"},{\"version\":\"17.12.6\",\"status\":\"affected\"},{\"version\":\"17.12.5d\",\"status\":\"affected\"},{\"version\":\"17.13.1a\",\"status\":\"affected\"},{\"version\":\"17.14.1a\",\"status\":\"affected\"},{\"version\":\"17.15.1a\",\"status\":\"affected\"},{\"version\":\"17.15.2a\",\"status\":\"affected\"},{\"version\":\"17.15.2c\",\"status\":\"affected\"},{\"version\":\"17.15.3\",\"status\":\"affected\"},{\"version\":\"17.15.3a\",\"status\":\"affected\"},{\"version\":\"17.15.4\",\"status\":\"affected\"},{\"version\":\"17.15.4c\",\"status\":\"affected\"},{\"version\":\"17.16.1a\",\"status\":\"affected\"},{\"version\":\"17.17.1\",\"status\":\"affected\"},{\"version\":\"17.18.1a\",\"status\":\"affected\"},{\"version\":\"17.18.2\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L\",\"baseScore\":5.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-03-04T17:18:34.575633Z\",\"id\":\"CVE-2026-20005\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-392\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz\",\"source\":\"psirt@cisco.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20005\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-04T17:18:34.575633Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-04T17:18:53.283Z\"}}], \"cna\": {\"source\": {\"defects\": [\"CSCwo93207\", \"CSCwn65473\", \"CSCwp99280\", \"CSCwo93208\"], \"advisory\": \"cisco-sa-snort3-multi-dos-XFWkWSwz\", \"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 5.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Secure Firewall Threat Defense (FTD) Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"7.6.0\"}, {\"status\": \"affected\", \"version\": \"7.6.1\"}, {\"status\": \"affected\", \"version\": \"7.6.2\"}, {\"status\": \"affected\", \"version\": \"7.6.2.1\"}, {\"status\": \"affected\", \"version\": \"7.7.0\"}, {\"status\": \"affected\", \"version\": \"7.7.10\"}, {\"status\": \"affected\", \"version\": \"7.7.10.1\"}]}, {\"vendor\": \"Cisco\", \"product\": \"Cisco Cyber Vision\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.0.4\"}, {\"status\": \"affected\", \"version\": \"3.0.0\"}, {\"status\": \"affected\", \"version\": \"3.0.1\"}, {\"status\": \"affected\", \"version\": \"3.0.2\"}, {\"status\": \"affected\", \"version\": \"3.0.3\"}, {\"status\": \"affected\", \"version\": \"3.0.5\"}, {\"status\": \"affected\", \"version\": \"3.0.6\"}, {\"status\": \"affected\", \"version\": \"3.1.0\"}, {\"status\": \"affected\", \"version\": \"3.1.2\"}, {\"status\": \"affected\", \"version\": \"3.1.1\"}, {\"status\": \"affected\", \"version\": \"3.2.3\"}, {\"status\": \"affected\", \"version\": \"3.2.1\"}, {\"status\": \"affected\", \"version\": \"3.2.4\"}, {\"status\": \"affected\", \"version\": \"3.2.0\"}, {\"status\": \"affected\", \"version\": \"3.2.2\"}, {\"status\": \"affected\", \"version\": \"4.0.0\"}, {\"status\": \"affected\", \"version\": \"4.0.1\"}, {\"status\": \"affected\", \"version\": \"4.0.2\"}, {\"status\": \"affected\", \"version\": \"4.0.3\"}, {\"status\": \"affected\", \"version\": \"4.1.0\"}, {\"status\": \"affected\", \"version\": \"4.1.1\"}, {\"status\": \"affected\", \"version\": \"4.1.2\"}, {\"status\": \"affected\", \"version\": \"4.1.3\"}, {\"status\": \"affected\", \"version\": \"4.1.4\"}, {\"status\": \"affected\", \"version\": \"4.1.5\"}, {\"status\": \"affected\", \"version\": \"4.1.6\"}, {\"status\": \"affected\", \"version\": \"4.1.7\"}, {\"status\": \"affected\", \"version\": \"4.2.0\"}, {\"status\": \"affected\", \"version\": \"4.2.1\"}, {\"status\": \"affected\", \"version\": \"4.2.4\"}, {\"status\": \"affected\", \"version\": \"4.2.6\"}, {\"status\": \"affected\", \"version\": \"4.2.2\"}, {\"status\": \"affected\", \"version\": \"4.2.3\"}, {\"status\": \"affected\", \"version\": \"4.3.0\"}, {\"status\": \"affected\", \"version\": \"4.3.1\"}, {\"status\": \"affected\", \"version\": \"4.3.2\"}, {\"status\": \"affected\", \"version\": \"4.3.3\"}, {\"status\": \"affected\", \"version\": \"4.4.0\"}, {\"status\": \"affected\", \"version\": \"4.4.1\"}, {\"status\": \"affected\", \"version\": \"4.4.2\"}, {\"status\": \"affected\", \"version\": \"4.4.3\"}, {\"status\": \"affected\", \"version\": \"5.0.0\"}, {\"status\": \"affected\", \"version\": \"5.0.1\"}, {\"status\": \"affected\", \"version\": \"5.0.2\"}, {\"status\": \"affected\", \"version\": \"5.1.1\"}, {\"status\": \"affected\", \"version\": \"5.1.2\"}, {\"status\": \"affected\", \"version\": \"5.1.3\"}, {\"status\": \"affected\", \"version\": \"5.2.0\"}, {\"status\": \"affected\", \"version\": \"5.2.1\"}, {\"status\": \"affected\", \"version\": \"5.3.0\"}, {\"status\": \"affected\", \"version\": \"5.3.1\"}, {\"status\": \"affected\", \"version\": \"5.3.2\"}]}, {\"vendor\": \"Cisco\", \"product\": \"Cisco UTD SNORT IPS Engine Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"17.2.1r\"}, {\"status\": \"affected\", \"version\": \"17.3.1a\"}, {\"status\": \"affected\", \"version\": \"17.3.2\"}, {\"status\": \"affected\", \"version\": \"17.3.3\"}, {\"status\": \"affected\", \"version\": \"17.3.4a\"}, {\"status\": \"affected\", \"version\": \"17.3.6\"}, {\"status\": \"affected\", \"version\": \"17.3.5\"}, {\"status\": \"affected\", \"version\": \"17.3.7\"}, {\"status\": \"affected\", \"version\": \"17.3.8\"}, {\"status\": \"affected\", \"version\": \"17.4.1a\"}, {\"status\": \"affected\", \"version\": \"17.4.2\"}, {\"status\": \"affected\", \"version\": \"17.4.1b\"}, {\"status\": \"affected\", \"version\": \"17.5.1a\"}, {\"status\": \"affected\", \"version\": \"17.6.1a\"}, {\"status\": \"affected\", \"version\": \"17.6.2\"}, {\"status\": \"affected\", \"version\": \"17.6.3a\"}, {\"status\": \"affected\", \"version\": \"17.6.4\"}, {\"status\": \"affected\", \"version\": \"17.6.5\"}, {\"status\": \"affected\", \"version\": \"17.6.6\"}, {\"status\": \"affected\", \"version\": \"17.6.7\"}, {\"status\": \"affected\", \"version\": \"17.6.8a\"}, {\"status\": \"affected\", \"version\": \"17.7.1a\"}, {\"status\": \"affected\", \"version\": \"17.7.2\"}, {\"status\": \"affected\", \"version\": \"17.10.1a\"}, {\"status\": \"affected\", \"version\": \"17.9.1a\"}, {\"status\": \"affected\", \"version\": \"17.9.2a\"}, {\"status\": \"affected\", \"version\": \"17.9.3a\"}, {\"status\": \"affected\", \"version\": \"17.9.4\"}, {\"status\": \"affected\", \"version\": \"17.9.5a\"}, {\"status\": \"affected\", \"version\": \"17.9.6\"}, {\"status\": \"affected\", \"version\": \"17.9.5e\"}, {\"status\": \"affected\", \"version\": \"17.9.5f\"}, {\"status\": \"affected\", \"version\": \"17.9.7a\"}, {\"status\": \"affected\", \"version\": \"17.9.8\"}, {\"status\": \"affected\", \"version\": \"17.9.7b\"}, {\"status\": \"affected\", \"version\": \"17.8.1a\"}, {\"status\": \"affected\", \"version\": \"17.11.1a\"}, {\"status\": \"affected\", \"version\": \"17.12.1a\"}, {\"status\": \"affected\", \"version\": \"17.12.2\"}, {\"status\": \"affected\", \"version\": \"17.12.3\"}, {\"status\": \"affected\", \"version\": \"17.12.4\"}, {\"status\": \"affected\", \"version\": \"17.12.4a\"}, {\"status\": \"affected\", \"version\": \"17.12.4b\"}, {\"status\": \"affected\", \"version\": \"17.12.5\"}, {\"status\": \"affected\", \"version\": \"17.12.5a\"}, {\"status\": \"affected\", \"version\": \"17.12.5b\"}, {\"status\": \"affected\", \"version\": \"17.12.5c\"}, {\"status\": \"affected\", \"version\": \"17.12.6\"}, {\"status\": \"affected\", \"version\": \"17.12.5d\"}, {\"status\": \"affected\", \"version\": \"17.13.1a\"}, {\"status\": \"affected\", \"version\": \"17.14.1a\"}, {\"status\": \"affected\", \"version\": \"17.15.1a\"}, {\"status\": \"affected\", \"version\": \"17.15.2a\"}, {\"status\": \"affected\", \"version\": \"17.15.2c\"}, {\"status\": \"affected\", \"version\": \"17.15.3\"}, {\"status\": \"affected\", \"version\": \"17.15.3a\"}, {\"status\": \"affected\", \"version\": \"17.15.4\"}, {\"status\": \"affected\", \"version\": \"17.15.4c\"}, {\"status\": \"affected\", \"version\": \"17.16.1a\"}, {\"status\": \"affected\", \"version\": \"17.17.1\"}, {\"status\": \"affected\", \"version\": \"17.18.1a\"}, {\"status\": \"affected\", \"version\": \"17.18.2\"}]}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz\", \"name\": \"cisco-sa-snort3-multi-dos-XFWkWSwz\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\\r\\n\\r This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-392\", \"description\": \"Missing Report of Error Condition\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-03-04T17:31:57.391Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20005\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-04T18:04:14.731Z\", \"dateReserved\": \"2025-10-08T11:59:15.349Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-03-04T17:02:45.919Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

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Detection rules are retrieved from Rulezet.

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