CVE-2025-20234: Cisco Secure Endpoint

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the .

Affected products

• Cisco Secure Endpoint: before 1.26.1 (fixed in 1.26.1); before 7.5.21 (fixed in 7.5.21); from 8.0.1.21160, before 8.4.5 (fixed in 8.4.5)
• Cisco Secure Endpoint Private Cloud: before 4.2.2 (fixed in 4.2.2)
• Clamav Clamav: from 1.2.0, before 1.4.3 (fixed in 1.4.3)

Published 2025-06-18. Last modified 2026-06-17.