Qi-ANXIN QAX Virus Removal Mini Filter Driver QKSecureIO_Imp.sys ZwTerminateProcess access control

A weakness has been identified in Qi-ANXIN QAX Virus Removal up to 2025-10-22. The affected element is the function ZwTerminateProcess in the library QKSecureIO_Imp.sys of the component Mini Filter Driver. Executing a manipulation can lead to improper access controls. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

The quarantine - restore function in Qi-ANXIN Tianqing Endpoint Security Management System v10.0 allows user to restore a malicious file to an arbitrary file path. Attackers can write malicious DLL to system path and perform privilege escalation by leveraging Windows DLL hijacking vulnerabilities.