ZDI-26-583: Clam AntiVirus 7z Archive Parsing Integer Overflow Remote Code Execution Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Aug 13, 2026 · Catalog

   Detected

   This vulnerability allows remote attackers to execute arbitrary code on affected installations of Clam AntiVirus. Interaction with this product is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The ZDI has assigned a CVSS rating of 8.4. The following CVEs are assigned: CVE-2026-20215.

Sources

• CVE.orgVulnerability recordCVE-2026-20215

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-20215

  30-day exploitation probability 0.6%

  first.org
• Zero Day InitiativeCoordinated disclosureZDI-26-583

  This vulnerability allows remote attackers to execute arbitrary code on affected installations of Clam AntiVirus. Interaction with this product is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The ZDI has assigned a CVSS rating of 8.4. The following CVEs are assigned: CVE-2026-20215.

  zerodayinitiative.com