CVE-2026-105773 Canimaan Software CVE debrief

Who should care

Defenders responsible for systems using ClamXAV versions 3.3 through 3.11 should assess exposure and prioritize upgrading to version 3.11.1 or later. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify ClamXAV version and assess exposure in systems where local attackers may have gained privileges. The vulnerability's impact on system security and integrity requires immediate attention from

Why it matters

CVE-2026-105773 is a local privilege escalation vulnerability in ClamXAV, allowing local attackers to execute arbitrary code with system privileges. Defenders should prioritize verifying and upgrading to version 3.11.1 or later, and assess exposure in systems where local attackers may have gained privileges.

• Local attackers may execute arbitrary code with system privileges
• Potential for lateral movement and further exploitation
• Need for verification of ClamXAV version and upgrade to 3.11.1 or later
• Possible impact on system security and integrity

Technical summary

The vulnerability is caused by a race condition and insufficient file validation in the Privileged Helper Tool of ClamXAV versions 3.3 through 3.11, allowing local attackers to execute arbitrary code with system privileges. This issue affects ClamXAV deployments where local attackers may have gained privileges, and defenders should prioritize verifying and upgrading to ClamXAV version 3.11.1 or later. The vulnerability's technical impact involves the execution of arbitrary code with system privileges, potentially leading to lateral movement and further exploitation within affected systems.

Defensive priority

Defenders should prioritize verifying and upgrading to ClamXAV version 3.11.1 or later, and assess exposure in systems where local attackers may have gained privileges.

Recommended defensive actions

• Verify and upgrade to ClamXAV version 3.11.1 or later
• Assess exposure in systems where local attackers may have gained privileges
• Monitor for potential local privilege escalation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and fixed version. However, additional information on potential exploitation or impact is limited. Defenders should verify ClamXAV version and assess exposure in systems where local attackers may have gained privileges. The Privileged Helper Tool's race condition and insufficient file validation allow local attackers to execute arbitrary code with system privileges. Limited source detail exists on exploitation, so defenders must focus on verifying

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.