Is CVE-2025-20128 actively exploited?

No active exploitation of CVE-2025-20128 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-20128 be exploited remotely?

Yes. CVE-2025-20128 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-20128?

CVE-2025-20128 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2025-20128

HIGH

CVE-2025-20128

CWE-122Published: January 22, 2025· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-20128 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.