CVE-2026-20217
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk31th percentile — higher than 31% of all known CVEs
Summary
A vulnerability in the PESpin file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or other impacts due to memory corruption. The issue stems from improper boundary checks in PESpin files during scanning, potentially leading to an out-of-bounds buffer write.
Risk Assessment
Successful exploitation could terminate the ClamAV scanning process, causing a denial of service and potentially exposing the system to threats.
Recommendation
Immediately update ClamAV to the latest version containing the fix for CVE-2026-20217 and monitor vendor advisories.
Original NVD description (English source)
A vulnerability in the PESpin 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 PESpin 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 PESpin 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.