Buffer overflow in Cisco Secure Endpoint
CVE-2025-20128
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.
Vulnerability class: Buffer Overflow
EPSS: 0.016 (73.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Cisco Secure Endpoint — versions 7.0.5, 6.2.19, 7.3.3
- Cisco Secure_endpoint
- Cisco Secure_endpoint_private_cloud
- Clamav
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (Third Party Advisory)
- psirt@cisco.com (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-20128?
- CVE-2025-20128 is a medium-severity vulnerability in Cisco Secure Endpoint, classified under Heap-based Buffer Overflow. CVSS score: 5.3/10. Published 2025-01-22.
- How severe is CVE-2025-20128?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-20128 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.