CVE-2025-20128: Cisco Secure Endpoint

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

A vulnerability in the Object Linking and Embedding 2 (OLE2) decryption routine 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 an integer underflow in a bounds check that allows for a heap buffer overflow read. An attacker could exploit this vulnerability by submitting a crafted file containing OLE2 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 . Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Affected products

• Cisco Secure Endpoint: before 1.24.4 (fixed in 1.24.4); before 1.25.1 (fixed in 1.25.1); before 7.5.20 (fixed in 7.5.20); from 8.0.1.21160, before 8.4.3 (fixed in 8.4.3)
• Cisco Secure Endpoint Private Cloud: before 4.2.0 (fixed in 4.2.0)
• Clamav Clamav: from 1.0.0, before 1.0.8 (fixed in 1.0.8); from 1.1.0, before 1.4.2 (fixed in 1.4.2)

Published 2025-01-22. Last modified 2026-06-17.