CVE-2021-23167

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-18 · updated 2026-06-17
Weakness: CWE-295

Description

Improper certificate validation vulnerability in SMTP Client allows man-in-the-middle attack to retrieve sensitive information from the Command Centre Server. This issue affects: Gallagher Command Centre 8.50 versions prior to 8.50.2048 (MR3); 8.40 versions prior to 8.40.2063 (MR4); 8.30 versions prior to 8.30.1454 (MR4) ; version 8.20 and prior versions.

Affected products

Gallagher Command Centre: through 8.20; from 8.30 before 8.30.1454; from 8.40 before 8.40.2063; from 8.50 before 8.50.2048 — fixed in 8.30.1454, 8.40.2063, 8.50.2048

How to fix

Upgrade to a fixed version: Gallagher Command Centre 8.30.1454, 8.40.2063, 8.50.2048. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-23167 or the next vulnerability affects your stack