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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.

PUBLISHED Reserved 2026-01-18 | Published 2026-01-23 | Updated 2026-01-23 | Assigner VulnCheck




HIGH: 8.5CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Unquoted Search Path or Element

Product status

8.1
affected

Credits

Victor Mondragón finder

References

www.exploit-db.com/exploits/49586 (ExploitDB-49586) exploit

www.softros.com/ (Vendor Homepage) product

download.logonexpert.com/LogonExpertSetup64.msi (Software Download Link) product

www.vulncheck.com/...rt-logonexpertsvc-unquoted-service-path (VulnCheck Advisory: LogonExpert 8.1 - 'LogonExpertSvc' Unquoted Service Path) third-party-advisory

cve.org (CVE-2021-47890)

nvd.nist.gov (CVE-2021-47890)

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