What is CVE-2021-23136?

CVE-2021-23136 is a medium-severity vulnerability in Gallagher Command Centre, classified under Improper Authorization. CVSS score: 6.5/10. Published 2021-06-11.

How severe is CVE-2021-23136?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Gallagher Command Centre

CVE-2021-23136

Improper Authorization vulnerability in Gallagher Command Centre Server allows macro overrides to be performed by an unprivileged Command Centre Operator. This issue affects: Gallagher Command Centre 8.40 versions prior to 8.40.1888 (MR3); 8.30 versions prior to 8.30.1359 (MR3); 8.20 versions prior to 8.20.1259 (MR5); version 8.10 and prior versions.

Published 2021-06-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.8th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Gallagher Command Centre — versions unspecified, 8.40, 8.30
Gallagher Command Centre

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

security.gallagher.com/Security-Advisories/CVE-2021-23136 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-23136?: CVE-2021-23136 is a medium-severity vulnerability in Gallagher Command Centre, classified under Improper Authorization. CVSS score: 6.5/10. Published 2021-06-11.
How severe is CVE-2021-23136?: Medium severity. CVSS v3 base score is 6.5 out of 10.