ClamAV — Cyber Threats, Attacks & Incidents

Related Threat Clusters

• Multiple ClamAV Vulnerabilities Lead to Denial of Service Risks

  On July 1, 2026, several vulnerabilities affecting ClamAV were disclosed, including issues with PE files, 7z archives, and InstallShield files that could lead to denial of service (DoS) attacks. The vulnerabilities are…

  10 articles · Updated July 8, 2026
• Cisco Discloses High-Severity ClamAV Vulnerabilities Allowing Remote DoS Attacks

  Cisco has identified seven high-severity vulnerabilities in ClamAV, tracked as CVE-2026-20337, CVE-2026-20338, CVE-2026-20339, CVE-2026-20345, CVE-2026-20346, CVE-2026-20347, and CVE-2026-20348. These flaws enable…

  2 articles · Updated August 11, 2026
• Cisco Patches Long-Standing Vulnerabilities in ClamAV Antivirus Engine

  Cisco's Talos group released security patches for ClamAV, an open-source antivirus engine, addressing seven vulnerabilities in versions 1.5.3 and 1.4.5. These flaws, some dating back nearly two decades, primarily affect…

  2 articles · Updated July 6, 2026

Recent Intelligence Reports

• Cisco warns of high — Bleepingcomputer · August 11, 2026
• CiscoClamAV Vulnerabilities Let Remote Attackers Crash Antivirus Scanning With Crafted Files — Gbhackers · August 11, 2026
• USN-8517-1: ClamAV vulnerabilities — Ubuntu · July 8, 2026
• Cisco patches decades — Feeds.4Sysops · July 6, 2026

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