CVE-2021-47890 - CVE House
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Status published High CVE-2021-47890

LogonExpert 8.1 - 'LogonExpertSvc' Unquoted Service Path

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Victor Mondragón

Affected Vendor

Softros Systems

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Affected Software

LogonExpert
Vulnerable Versions:
8.1

Timeline

Official Publish: January 23rd, 2026
Last Modified: January 23rd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)