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Vulnerabilities

Vulnerability · CVE-2026-20215

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

Published Aug 13, 2026 · ZDI-26-583: Clam AntiVirus 7z

Check if you run it

No confirmed exploitation is on record for CVE-2026-20215. EPSS is 0.57%. Act only if a listed version of ZDI-26-583: Clam AntiVirus 7z is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (ZDI-26-583: Clam AntiVirus 7z).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.57%
Remediation
Not established
Affected products
See sources for product scope

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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-20215

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-20215. EPSS is 0.57%. Act only if a listed version of ZDI-26-583: Clam AntiVirus 7z is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.57%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.