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Vulnerability record · CVE-2021-23167 · published 18 November 2021

CVE-2021-23167: Gallagher command centre improper certificate validation vulnerability

Gallagher · Command Centre

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.

6.8 CVSS 3.1 Medium EPSS 0.40% · top 68.4% CWE-295 · Improper certificate validation
6.8CVSS 3.1 base score, v2 4.3
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://security.gallagher.com/Security-Advisories/CVE-2021-23167 Vendor Advisory
https://security.gallagher.com/Security-Advisories/CVE-2021-23167 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-23167), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.