If you identify an NSSM service, check if your current user context can modify its registry parameters. The accesschk tool from Sysinternals is perfect for this:
The vulnerability landscape for NSSM extends beyond CVE‑2025‑41686. Several other CVEs highlight the recurring theme of insecure file permissions when NSSM is deployed: nssm224 privilege escalation updated
NSSM stores its configuration parameters inside the Windows Registry under the HKLM\SYSTEM\CurrentControlSet\Services\ key. If you identify an NSSM service, check if