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CVE-2022-31466: TOCTOU Vulnerability in Quick Heal Total Security

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-23 · updated 2026-06-17
• Weakness: CWE-59

Description

Time of Check - Time of Use (TOCTOU) vulnerability in Quick Heal Total Security prior to 12.1.1.27 allows a local attacker to achieve privilege escalation, potentially leading to deletion of system files. This is achieved through exploiting the time between detecting a file as malicious and when the action of quarantining or cleaning is performed, and using the time to replace the malicious file by a symlink.

Affected products

• Quickheal Total Security: before 12.1.1.27 — fixed in 12.1.1.27

How to fix

Upgrade to a fixed version: Quickheal Total Security 12.1.1.27. Check the vendor advisory for mitigations.

References

• https://softwaresec001.wordpress.com/2022/05/13/privilege-escalation-vulnerability-in-quick-heal-total-security/
• https://softwaresec001.wordpress.com/2022/05/13/privilege-escalation-vulnerability-in-quick-heal-total-security/

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