Memory Corruption Vulnerability in ClamAV's PESpin File Format Parser
CVE-2026-20217

7.5HIGH

Key Information:

Vendor

Cisco
Status
Cisco Secure Endpoint
Vendor
CVE Published:
1 July 2026

Badges

👾 Exploit Exists

What is CVE-2026-20217?

A vulnerability exists within the PESpin file format parser of ClamAV, allowing an unauthenticated remote attacker to potentially cause a denial of service (DoS) condition. This issue arises from inadequate boundary checks for PESpin file content during the scanning process, which can lead to out-of-bounds buffer writes. By submitting specially crafted PESpin files for scanning, attackers may exploit this vulnerability, resulting in the termination of the ClamAV scanning process and possibly affecting service availability on impacted devices.

Affected Version(s)

Cisco Secure Endpoint 7.0.5

Cisco Secure Endpoint 6.2.19

Cisco Secure Endpoint 7.3.3

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.