CVE-2025-20128 – ClamAV OLE2 Denial of Service (DoS) Buffer Overflow Vulnerability

CVE ID : CVE-2025-20128

Published : Jan. 22, 2025, 5:15 p.m. | 1 hour, 1 minute ago

Description : 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.

Severity: 5.3 | MEDIUM

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CVE-2025-20128 – ClamAV OLE2 Denial of Service (DoS) Buffer Overflow Vulnerability