CVE-2021-47890
LogonExpert 8.1 - 'LogonExpertSvc' Unquoted Service Path
- State
- Published
- Severity
- 8.5 High
- Published
- Jan 23, 2026
- Updated
- Jan 23, 2026
- Reserved
- Jan 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.5 High | 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 | VulnCheck |
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-428 Unquoted Search Path or Element
Affected Products
| Product | Versions |
|---|---|
LogonExpertSoftros Systems |
|
References
- ExploitDB-49586exploit
- Vendor Homepageproduct
- Software Download Linkproduct
- VulnCheck Advisory: LogonExpert 8.1 - 'LogonExpertSvc' Unquoted Service Paththird-party-advisory
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