CVE-2026-20213
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk37th percentile — higher than 37% of all known CVEs
Summary
A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other impacts, due to memory corruption. The issue stems from improper boundary checks in PE files, leading to an out-of-bounds buffer write.
Risk Assessment
Successful exploitation could terminate the ClamAV scanning process, resulting in a denial of service and potentially exposing the system to further attacks.
Recommendation
Update ClamAV to the latest patched version immediately. As a workaround, restrict scanning of untrusted PE files and monitor logs for unusual activity.
Original NVD description (English source)
A vulnerability in the PE file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in PE files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains PE content 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.