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CVE-2026-76519

9.8 critical KEV · due 2026-10-17 exploit SSVC exploitation: active Analyzed
NVD · CVE.org · CISA KEV

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.

Fix

Public exploits 1

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

CISA KEV required action · due 2026-10-17

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Added to the catalog 2026-10-14. CISA KEV

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

In the news 3

Change history 3

  1. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-15 13:47
  2. StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-15 13:47
  3. First seenCVSS 9.8 · in KEVNVD modified 2026-10-14 20:23

Affected (CPE criteria) 1

  • cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*

References 2