What is CVE-2021-40851?

CVE-2021-40851 is a high-severity vulnerability in Tcman Gim, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-12-17.

How severe is CVE-2021-40851?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Tcman Gim

CVE-2021-40851

TCMAN GIM is vulnerable to a lack of authorization in all available webservice methods listed in /PC/WebService.asmx. The exploitation of this vulnerability might allow a remote attacker to obtain information.

Vulnerability class: Broken Authentication

Published 2021-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Tcman Gim — versions 8.0, 11.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.incibe-cert.es/en/early-warning/security-advisories/tcman-gim-sql-improper-… (Third Party Advisory)

Frequently asked questions

What is CVE-2021-40851?: CVE-2021-40851 is a high-severity vulnerability in Tcman Gim, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-12-17.
How severe is CVE-2021-40851?: High severity. CVSS v3 base score is 7.5 out of 10.