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CVE-2026-20217

7.5 high exploit SSVC exploitation: none Analyzed
NVD · CVE.org

A vulnerability in the PESpin file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PESpin files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains PESpin content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.

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.

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.

Change history 1

  1. First seenCVSS 7.5 · cisco, clamavNVD modified 2026-10-25 17:10

Affected (CPE criteria) 4

  • cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:*
  • cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:*
  • cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*
  • cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*

References 1