High severity7.8NVD Advisory· Published Jan 23, 2026· Updated Apr 15, 2026

CVE-2021-47890

Description

LogonExpert 8.1 contains an unquoted service path vulnerability in the LogonExpertSvc service running with LocalSystem privileges. Attackers can exploit the unquoted path to place malicious executables in intermediate directories, potentially gaining elevated system access during service startup.

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

download.logonexpert.com/LogonExpertSetup64.msinvd
www.exploit-db.com/exploits/49586nvd
www.softros.comnvd
www.vulncheck.com/advisories/logonexpert-logonexpertsvc-unquoted-service-pathnvd

News mentions

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