CVE-2026-20345

HIGH · CVSS 7.5 · EPSS 0.33% · CWE CWE-121

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.

CVE-2026-20345 is confirmed by Cisco as affecting 2 products, including Cisco Secure Endpoint and Cisco Catalyst SD-WAN Manager, via 1 advisory (CVSS 7.5; EPSS 0.3%).

2 products with CSAF evidence