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Vulnerabilities ›

CVE-2021-47890

High

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 executable

CWE-428 — Weakness Type

                    Published: Jan 23, 2026                      ·  Modified: Feb 28, 2026                      ·  Source: NVD                

CVSS v3

7.8

🔗 NVD Official

📄 Description (English)

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.

🤖

Queued for AI Analysis

This CVE will be auto-analyzed on the next cron run.

🔗 References & Sources 4

https://download.logonexpert.com/LogonExpertSetup64.msi

disclosure@vulncheck.com

https://www.exploit-db.com/exploits/49586

disclosure@vulncheck.com

https://www.softros.com/

disclosure@vulncheck.com

https://www.vulncheck.com/advisories/logonexpert-logonexpertsvc-unquoted-service-path

disclosure@vulncheck.com

📊 CVSS Score

7.8

/ 10.0 — High

📊 CVSS Vector

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

Attack VectorL — Low / Local

Attack ComplexityL — Low / Local

Privileges RequiredL — Low / Local

User InteractionN — None / Network

ScopeU — Unchanged

ConfidentialityH — High

IntegrityH — High

AvailabilityH — High

📋 Quick Facts

Severity High

CVSS Score7.8

CWECWE-428

EPSS0.02%

Exploit No

Patch ✓ Yes

Published 2026-01-23

Source Feed nvd

Views 2

🏷️ Tags

CWE-428

⚡ Actions

🔗 NVD Official Page ⚡ Exploit-DB Search 🐙 GitHub PoC Search 🎯 MITRE ATT&CK 📊 CVE Details

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