Is CVE-2021-40851 actively exploited?

No active exploitation of CVE-2021-40851 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40851 be exploited remotely?

Yes. CVE-2021-40851 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40851?

CVE-2021-40851 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2021-40851

HIGH

CVE-2021-40851

CWE-287Published: December 17, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-40851 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.