Is CVE-2021-23204 actively exploited?

No active exploitation of CVE-2021-23204 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-23204 be exploited remotely?

Yes. CVE-2021-23204 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-23204?

CVE-2021-23204 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2021-23204

CWE-200Published: June 11, 2021· Updated: Jun 17, 2026

6.5

CVSS v3.1

Official Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Gallagher Command Centre Server allows OSDP key material to be exposed to Command Centre Operators. This issue affects: Gallagher Command Centre 8.40 versions prior to 8.40.1888 (MR3); 8.30 versions prior to 8.30.1359 (MR3).

NVD Source

Technical Analysis

CVE-2021-23204 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.