CVE-2026-20338
ClamAV ZIP File Format Processing Memory Corruption Vulnerability
Description
A vulnerability in the zip archive parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper memory handling when processing content in zip files during scanning. An attacker could exploit this vulnerability by submitting a crafted zip file for scanning. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate as a result of a memory double-free, resulting in a DoS condition on the affected software.
CVSS Vector Breakdown
AV:NAttack VectorAC:LAttack ComplexityPR:NPrivileges RequiredUI:NUser InteractionS:UScopeC:NConfidentialityI:NIntegrityA:HAvailabilityWeaknesses
Affected Products
Exploitability
Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.
View exploit detailsAttack Graph
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MITRE ATT&CK
1 techniqueReferences
- ⚡ Weekly Recap: VMware Exploits, Windows 0-Day, MCP Attacks, Browser Hijacks and Moreen·The Hacker News· Exploited Lazarus Group ransomware
- Cisco warns of high-severity ClamAV flaws with public exploitsen-us·BleepingComputer· PoC Secure Endpoint Connector ddos-botnet
- Cisco Warns of High-Severity ClamAV Vulnerabilities With Public PoCen-us·SecurityWeek· PoC Secure Endpoint Connector ddos-botnet
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