Vulnerability-Lookup

NCSC-2026-0429

Vulnerability from csaf_ncscnl - Published: 2026-10-14 18:46 - Updated: 2026-10-14 18:46

Summary

Kwetsbaarheid verholpen in Cisco Secure Email Gateway

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.

Feiten: Cisco heeft een kwetsbaarheid verholpen in Cisco Secure Email Gateway, specifiek in de Advanced Malware Protection feature.

Interpretaties: De kwetsbaarheid bevindt zich in de wijze waarop de Advanced Malware Protection feature e-mailbijlagen verwerkt wanneer de file reputation service is ingeschakeld. Een niet-geauthenticeerde externe aanvaller kan hierdoor willekeurige bestanden schrijven naar het onderliggende besturingssysteem. Misbruik van deze kwetsbaarheid kan leiden tot het uitvoeren van commando's met rootrechten, wat de systeemintegriteit beïnvloedt. Cisco meldt bekend te zijn met actief misbruik en heeft Indicators of Compromise en uitgebreide achtergrondinformatie gedeeld. Op dit moment is (nog) geen Proof-of-Concept-code (PoC) of exploitcode bekend, maar door de aard van de kwetsbaarheid is het aannemelijk dat op korte termijn een PoC of exploit publiek beschikbaar komt. Het NCSC verwacht daarom een toename in scanverkeer en pogingen tot misbruik.

Oplossingen: Cisco heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Zie bijgevoegde referenties voor meer informatie, waaronder achtergrondinformatie en IoC's.

Kans: high

Schade: high

CWE-23: Relative Path Traversal

CVE-2026-76519

A vulnerability in Cisco Secure Email Gateway's Advanced Malware Protection feature allows unauthenticated remote attackers to write arbitrary files and execute commands with root privileges by exploiting improper handling of email attachments when the file reputation service is enabled.

9.8 (Critical)


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

CWE-23 - Relative Path Traversal

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
vers:unknown/* Cisco / Cisco Secure Email		vers:unknown/*

References

3 references

URL	Category
https://sec.cloudapps.cisco.com/security/center/c…	external
https://sec.cloudapps.cisco.com/security/center/c…	external
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Cisco heeft een kwetsbaarheid verholpen in Cisco Secure Email Gateway, specifiek in de Advanced Malware Protection feature.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheid bevindt zich in de wijze waarop de Advanced Malware Protection feature e-mailbijlagen verwerkt wanneer de file reputation service is ingeschakeld. Een niet-geauthenticeerde externe aanvaller kan hierdoor willekeurige bestanden schrijven naar het onderliggende besturingssysteem. Misbruik van deze kwetsbaarheid kan leiden tot het uitvoeren van commando\u0027s met rootrechten, wat de systeemintegriteit be\u00efnvloedt.\n\nCisco meldt bekend te zijn met actief misbruik en heeft Indicators of Compromise en uitgebreide achtergrondinformatie gedeeld.\n\nOp dit moment is (nog) geen Proof-of-Concept-code (PoC) of exploitcode bekend, maar door de aard van de kwetsbaarheid is het aannemelijk dat op korte termijn een PoC of exploit publiek beschikbaar komt. Het NCSC verwacht daarom een toename in scanverkeer en pogingen tot misbruik.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Cisco heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Zie bijgevoegde referenties voor meer informatie, waaronder achtergrondinformatie en IoC\u0027s.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
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        "text": "Relative Path Traversal",
        "title": "CWE-23"
      }
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    "publisher": {
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      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
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    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-afw-zqYJkjxp"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm"
      }
    ],
    "title": "Kwetsbaarheid verholpen in Cisco Secure Email Gateway",
    "tracking": {
      "current_release_date": "2026-10-14T18:46:36.525518Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
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                "name": "vers:unknown/*",
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                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-1"
                }
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            "category": "product_name",
            "name": "Cisco Secure Email"
          }
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        "category": "vendor",
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        "id": "CWE-23",
        "name": "Relative Path Traversal"
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      "notes": [
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          "category": "other",
          "text": "Relative Path Traversal",
          "title": "CWE-23"
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        {
          "category": "description",
          "text": "A vulnerability in Cisco Secure Email Gateway\u0027s Advanced Malware Protection feature allows unauthenticated remote attackers to write arbitrary files and execute commands with root privileges by exploiting improper handling of email attachments when the file reputation service is enabled.",
          "title": "Summary"
        }
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        "known_affected": [
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      "scores": [
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            "version": "3.1"
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          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-76519"
    }
  ]
}

CVE-2026-76519 (GCVE-0-2026-76519)

Vulnerability from cvelistv5 – Published: 2026-10-14 16:07 – Updated: 2026-10-15 03:56

Title

Cisco Secure Email Gateway Arbitrary File Write Vulnerability

Summary

A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system.

Severity

9.8 (Critical)


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

SSVC

Exploitation: active Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 00:00 UTC

CWE

CWE-23 - Relative Path Traversal

Assigner

cisco CNA under the mitre root

CNA scorecard C 66/100 over 377 records in the last 180 days details

References

2 references

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco Secure Email	Affected: 14.0.0-698 Affected: 13.5.1-277 Affected: 13.0.0-392 Affected: 14.2.0-620 Affected: 13.0.5-007 Affected: 13.5.4-038 Affected: 14.2.1-020 Affected: 14.3.0-032 Affected: 15.0.0-104 Affected: 15.0.1-030 Affected: 15.5.0-048 Affected: 15.5.1-055 Affected: 15.5.2-018 Affected: 16.0.0-050 Affected: 15.0.3-002 Affected: 16.0.0-054 Affected: 15.5.3-022 Affected: 16.0.1-017 Affected: 15.5.4-012 Affected: 16.0.4-016 Affected: 15.0.5-016 Affected: 16.0.2-112 Affected: 16.0.3-044

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-76519",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-14T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2026-10-14",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76519"
              },
              "type": "kev"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-15T03:56:57.762Z",
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        },
        "references": [
          {
            "tags": [
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            ],
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        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-10-14T00:00:00.000Z",
            "value": "CVE-2026-76519 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "unknown",
          "product": "Cisco Secure Email",
          "vendor": "Cisco",
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              "status": "affected",
              "version": "14.0.0-698"
            },
            {
              "status": "affected",
              "version": "13.5.1-277"
            },
            {
              "status": "affected",
              "version": "13.0.0-392"
            },
            {
              "status": "affected",
              "version": "14.2.0-620"
            },
            {
              "status": "affected",
              "version": "13.0.5-007"
            },
            {
              "status": "affected",
              "version": "13.5.4-038"
            },
            {
              "status": "affected",
              "version": "14.2.1-020"
            },
            {
              "status": "affected",
              "version": "14.3.0-032"
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            {
              "status": "affected",
              "version": "15.0.0-104"
            },
            {
              "status": "affected",
              "version": "15.0.1-030"
            },
            {
              "status": "affected",
              "version": "15.5.0-048"
            },
            {
              "status": "affected",
              "version": "15.5.1-055"
            },
            {
              "status": "affected",
              "version": "15.5.2-018"
            },
            {
              "status": "affected",
              "version": "16.0.0-050"
            },
            {
              "status": "affected",
              "version": "15.0.3-002"
            },
            {
              "status": "affected",
              "version": "16.0.0-054"
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            {
              "status": "affected",
              "version": "15.5.3-022"
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            {
              "status": "affected",
              "version": "16.0.1-017"
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            {
              "status": "affected",
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        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "In October 2026, the Cisco PSIRT became aware of active exploitation of this vulnerability."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
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        }
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        "discovery": "INTERNAL"
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      "title": "Cisco Secure Email Gateway Arbitrary File Write Vulnerability"
    }
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  "cveMetadata": {
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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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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.
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