CVE-2026-20757 Race condition in Command Centre Server

What is CVE-2026-20757?

CVE-2026-20757 is a low-severity vulnerability in Gallagher Command Centre Server, published on 3 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper Locking vulnerability (CWE-667) in Gallagher Morpho integration allows a privileged operator to cause a limited denial-of-service in the Command Centre Server.

This issue affects Command Centre Server:

9.40 prior to vEL9.40.1976(MR1), 9.30 prior to vEL9.30.3382 (MR4), 9.20 prior to vEL9.20.3783 (MR6), 9.10 prior to vEL9.10.4647 (MR9), all versions of 9.00 and prior.

Weakness: CWE-667

Which versions are affected by CVE-2026-20757?

It affects 1 product.

Products include Gallagher Command Centre.

How do I fix CVE-2026-20757?

No fix has been published for CVE-2026-20757 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-20757 being exploited?

There is no known exploitation of CVE-2026-20757 in the wild and no public exploit code.

Other vulnerabilities in Gallagher Command Centre Server

• CVE-2021-23140 Missing authorization in Command Centre Critical 9.9
• CVE-2021-23230 SQL injection in Command Centre Critical 9.9
• CVE-2020-16096 Missing authorization in Command Centre Critical 9.9
• CVE-2020-16098 Information disclosure in Command Centre Critical 9.8
• CVE-2019-15294 Information disclosure in n/a Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-v28g-2c4f-rjxr.