CVE-2026-18605 CheckMAL AppCheck Pro Kernel Mini-Filter Driver AppCheckD.sys uncontrolled search path
Local attackers can exploit an uncontrolled search path in the AppCheck Pro kernel driver to achieve privilege escalation or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18605?
CVE-2026-18605 is a high-severity path traversal vulnerability in CheckMAL AppCheck Pro, published on 3 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security flaw has been discovered in CheckMAL AppCheck Pro 3.1.43.10. Affected is an unknown function in the library AppCheckD.sys of the component Kernel Mini-Filter Driver. Performing a manipulation results in uncontrolled search path. The attack requires a local approach. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-18605?
How do I fix CVE-2026-18605?
No fix has been published for CVE-2026-18605 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-18605 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18605 exists.
Sources
Also known as GHSA-fw2f-f4jh-88rv.