CVE-2021-47890

LogonExpert 8.1 - 'LogonExpertSvc' Unquoted Service Path

Published Jan 23, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Softros Systems
Softros Systems logonexpert
Vendors & Products Softros Systems
Softros Systems logonexpert
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title LogonExpert 8.1 - 'LogonExpertSvc' Unquoted Service Path
Weaknesses CWE-428
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Jan 23, 2026, 7:17 PM
Reserved
Jan 18, 2026, 12:35 PM
Status
Deferred
Published
Jan 23, 2026, 5:15 PM
Modified
Jun 17, 2026, 4:18 AM