CVE-2026-20757

Limited service interruption via improper locking

Published Mar 3, 2026 · Updated Mar 3, 2026

Improper locking in Gallagher Command Centre Server allows local users with operator privileges to cause a limited service interruption. The flaw occurs in the Morpho integration, but Gallagher has not disclosed the affected lock, operation, or contention sequence. Reachability requires operator privileges and a site licensed for the Morpho integration; the reported consequence is limited to server availability.

CVSS severity2.5
Low
EPSS probability0.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in Gallagher Command Centre Server allows local users with operator privileges to cause a limited service interruption. The flaw occurs in the Morpho integration, but Gallagher has not disclosed the affected lock, operation, or contention sequence. Reachability requires operator privileges and a site licensed for the Morpho integration; the reported consequence is limited to server availability.

The record

CVE
CVE-2026-20757
Published
Mar 3, 2026
Updated
Mar 3, 2026
Vendor
Gallagher Security
Product
Command Centre
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=9.00
  2. Affected versionversion=9.10 <9.10.4647 (MR9)
  3. Affected versionversion=9.20 <9.20.3783 (MR6)
  4. Affected versionversion=9.30 <9.30.3382 (MR4)
  5. Affected versionversion=9.40 <9.40.1976(MR1)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Gallagher Security · Command Centreversion=0 <=9.00; version=9.10 <9.10.4647 (MR9); version=9.20 <9.20.3783 (MR6); version=9.30 <9.30.3382 (MR4); version=9.40 <9.40.1976(MR1)

Published CVSS scores

2.5Gallagher Group Ltd.CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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