A security vulnerability has been identified in CheckMAL AppCheck Pro version 3.1.43.10, specifically within the AppCheckD.sys library of the Kernel Mini-Filter Driver component. The flaw involves an uncontrolled search path element that could be manipulated by a local attacker. Although the attack complexity is rated as high and exploitability is considered difficult, a public exploit has been released, increasing the risk of active exploitation. The vulnerability requires local access to the affected system. The vendor was notified prior to disclosure but did not respond. No patch or mitigation has been announced by the vendor at this time. The issue was reported via VulDB and is now tracked under CVE-2026-18605.