Multiple ClamAV Vulnerabilities Allow Remote Attacker to Trigger DoS Condition

Cisco has disclosed multiple high-severity vulnerabilities in ClamAV that could allow unauthenticated remote attackers to disrupt antivirus scanning operations and cause denial-of-service conditions. The flaws affect the ClamAV parsers used by Cisco Secure Endpoint Connector on Windows, Linux, and macOS. The advisory, tracked as cisco-sa-clamav-WuuvVd26, was first published on August 7, 2026, and updated on August 10. Cisco assigned a High security impact rating to affected Windows systems, while Linux and macOS environments received a Medium rating. The company said the difference is due to the privileged security context used by the ClamAV scanning process on Windows devices. Multiple ClamAV Vulnerabilities The...

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