Buffer overflow in Cisco Secure Endpoint
CVE-2026-20345
A vulnerability in the GPT file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper handling of an endian conversion operation, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted GPT file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Cisco Secure Endpoint — versions 1.12.3, 1.8.0, 1.11.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20345?
- CVE-2026-20345 is a high-severity vulnerability in Cisco Secure Endpoint, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-08-07.
- How severe is CVE-2026-20345?
- High severity. CVSS v3 base score is 7.5 out of 10.