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Vulnerability record · CVE-2026-20757 · published 3 March 2026

CVE-2026-20757: Gallagher command centre vulnerability

Gallagher · Command Centre

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.

2.5 CVSS 3.1 Low EPSS 0.07% · top 100.0% CWE-667 · CWE-667
2.5CVSS 3.1 base score
0.07%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
18 Aug 2026Last modified by NVD

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.

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

Affected products

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

References

LinkTags
https://security.gallagher.com/en-NZ/Security-Advisories/CVE-2026-20757 Vendor Advisory

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Related vulnerabilities

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

9.8CVE-2020-16098Gallagher command centre improper authentication vulnerabilityIt is possible to enumerate access card credentials via an unauthenticated network connection to the server in versions of Command Centre v8.20 prior…EPSS 1.1%9.8CVE-2019-15294Gallagher command centre sensitive information in log file vulnerabilityAn issue was discovered in Gallagher Command Centre 8.10 before 8.10.1092(MR2). Upon an upgrade, if a custom service account is in use and the visito…EPSS 1.2%8.8CVE-2021-23140Gallagher command centre improper authorization vulnerabilityImproper Authorization vulnerability in Gallagher Command Centre Server allows command line macros to be modified by an unauthorised Command Centre O…EPSS 0.85%8.8CVE-2020-16103Gallagher command centre type confusion vulnerabilityType confusion in Gallagher Command Centre Server allows a remote attacker to crash the server or possibly cause remote code execution. This issue af…EPSS 2.3%8.6CVE-2026-25193Gallagher active directory sync sensitive information in log file vulnerabilityInsertion of Sensitive Information into Log File (CWE-532) in some Command Centre Service installers could lead to Service Account credentials exposu…EPSS 0.14%8.2CVE-2020-16102Gallagher command centre improper authentication vulnerabilityImproper Authentication vulnerability in Gallagher Command Centre Server allows an unauthenticated remote attacker to create items with invalid confi…EPSS 1.0%8.1CVE-2023-23570Gallagher command centre vulnerabilityClient-Side enforcement of Server-Side security for the Command Centre server could be bypassed and lead to invalid configuration with undefined beha…EPSS 0.67%8.1CVE-2021-23205Gallagher command centre vulnerabilityImproper Encoding or Escaping in Gallagher Command Centre Server allows a Command Centre Operator to alter the configuration of Controllers and other…EPSS 0.87%

Source: NIST National Vulnerability Database (record CVE-2026-20757), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.