Secure Endpoint and ClamAV
CVE-2025-20128: ClamAV OLE2 File Format Decryption Denial of Service Vulnerability
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Cisco Secure Endpoint 7.0 | See the advisory |
| Cisco Secure Endpoint 6.2 | See the advisory |
| Cisco Secure Endpoint 7.3 | See the advisory |
| Cisco Secure Endpoint 7.2 | See the advisory |
| Cisco Secure Endpoint 6.1 | See the advisory |
| Cisco Secure Endpoint 6.3 | See the advisory |
| Cisco Secure Endpoint 6.2 | See the advisory |
| Cisco Secure Endpoint 7.3 | See the advisory |
| Cisco Secure Endpoint 6.2 | See the advisory |
| Cisco Secure Endpoint 7.2 | See the advisory |
| Cisco Secure Endpoint 7.1 | See the advisory |
| Cisco Secure Endpoint 6.3 | See the advisory |
| Cisco Secure Endpoint 6.2 | See the advisory |
| Cisco Secure Endpoint 7.3 | See the advisory |
| Cisco Secure Endpoint 6.1 | See the advisory |
| Cisco Secure Endpoint 7.2 | See the advisory |
| Cisco Secure Endpoint 7.2 | See the advisory |
| Cisco Secure Endpoint 7.1 | See the advisory |
| Cisco Secure Endpoint 6.3 | See the advisory |
| Cisco Secure Endpoint 7.3 | See the advisory |
| Cisco Secure Endpoint 6.2 | See the advisory |
| Cisco Secure Endpoint 6.1 | See the advisory |
| Cisco Secure Endpoint 7.2 | See the advisory |
| Cisco Secure Endpoint 6.3 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.8 | See the advisory |
| Cisco Secure Endpoint 1.11 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.10 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.8 | See the advisory |
| Cisco Secure Endpoint 1.10 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.14 | See the advisory |
| Cisco Secure Endpoint 1.10 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.6 | See the advisory |
| Cisco Secure Endpoint 1.11 | See the advisory |
| Cisco Secure Endpoint 1.7 | See the advisory |
| Cisco Secure Endpoint 1.13 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.8 | See the advisory |
| Cisco Secure Endpoint 1.13 | See the advisory |
| Cisco Secure Endpoint 1.9 | See the advisory |
| Cisco Secure Endpoint 1.9 | See the advisory |
| Cisco Secure Endpoint 1.12 | See the advisory |
| Cisco Secure Endpoint 1.13 | See the advisory |
| Cisco Secure Endpoint 8.1 | See the advisory |
| Cisco Secure Endpoint 8.1 | See the advisory |
| Cisco Secure Endpoint 8.1 | See the advisory |
| Cisco Secure Endpoint 8.1 | See the advisory |
| Cisco Secure Endpoint 8.1 | See the advisory |
| Cisco Secure Endpoint 8.1 | See the advisory |
| Cisco Secure Endpoint 8.1 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Exploitation
The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerabilities that are described in this advisory.
The Cisco PSIRT is not aware of any malicious use of the vulnerabilities that are described in this advisory.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.