What is CVE-2021-47890?

CVE-2021-47890 is a high-severity vulnerability in Softros Systems Logonexpert, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2026-01-23.

How severe is CVE-2021-47890?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Softros Systems Logonexpert

CVE-2021-47890

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.

EPSS: 0.001 (2.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Softros Systems Logonexpert — versions 8.1

Weakness classification (CWE)

CWE-428 — Unquoted Search Path or Element

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47890?: CVE-2021-47890 is a high-severity vulnerability in Softros Systems Logonexpert, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2026-01-23.
How severe is CVE-2021-47890?: High severity. CVSS v3 base score is 7.8 out of 10.