CVE-2026-26053 Overview
CVE-2026-26053 is an Incorrect Privilege Assignment vulnerability [CWE-266] in the Gallagher Command Centre Server. The flaw allows an authenticated operator with limited privileges to perform some operations that they would not normally be authorized to perform. Exploitation requires valid operator credentials and elevated attack complexity, but successful abuse results in integrity impact on the access control system. Gallagher Command Centre is widely deployed for physical access control, alarm management, and perimeter security in enterprise and critical infrastructure environments.
Critical Impact
An authenticated low-privilege operator can execute unauthorized operations on the Command Centre Server, undermining the integrity of physical access control and site security policies.
Affected Products
- Gallagher Command Centre 9.50 prior to vEL9.50.1587(MR1)
- Gallagher Command Centre 9.40 prior to vEL9.40.3130(MR3), 9.30 prior to vEL9.30.3983(MR5), 9.20 prior to vEL9.20.4349(MR7)
- All versions of Gallagher Command Centre 9.10
Discovery Timeline
- 2026-07-07 - CVE-2026-26053 published to NVD
- 2026-07-07 - Last updated in NVD database
Technical Details for CVE-2026-26053
Vulnerability Analysis
The vulnerability resides in the authorization logic of the Command Centre Server. The server assigns operators privileges that exceed the boundaries defined by their assigned role. As a result, a limited operator can invoke server-side operations reserved for higher-privileged accounts.
The attack is network-based and does not require user interaction. However, exploitation depends on specific conditions in the operator session, which raises attack complexity. Impact is limited to integrity, meaning attackers can alter data or configurations but cannot directly read confidential data or disrupt availability through this flaw.
Because Command Centre governs physical access rights, card holder records, and alarm workflows, unauthorized modifications can have downstream operational consequences at protected sites.
Root Cause
The root cause is Incorrect Privilege Assignment [CWE-266]. The server does not consistently validate whether the calling operator possesses the required role permission for each protected operation. Authorization checks are either missing or applied only at the interface layer, allowing certain server-side operations to succeed regardless of the operator's assigned role.
Attack Vector
An attacker must first authenticate to Command Centre as an operator with limited privileges. This can be achieved through legitimate access, credential compromise, or insider abuse. Once authenticated, the attacker issues requests to the Command Centre Server targeting operations outside their permission scope. Additional details are available in the Gallagher Security Advisory CVE-2026-26053.
Detection Methods for CVE-2026-26053
Indicators of Compromise
- Command Centre audit log entries showing operators executing configuration changes, cardholder modifications, or alarm operations outside their assigned role scope.
- Unexpected privilege-sensitive API calls originating from workstation accounts normally limited to monitoring functions.
- Modifications to access group memberships, door schedules, or operator permissions performed by non-administrator operator accounts.
Detection Strategies
- Review Command Centre server-side audit trails for discrepancies between an operator's assigned role and the operations they successfully executed.
- Baseline normal operator activity per role and alert on deviations, focusing on write operations against sensitive configuration objects.
- Correlate Command Centre logs with authentication events to identify sessions performing privileged actions after low-privilege logon.
Monitoring Recommendations
- Forward Command Centre audit logs to a centralized SIEM for long-term retention and cross-source correlation.
- Monitor for repeated failed authorization attempts followed by successful privileged operations from the same operator session.
- Track configuration change frequency per operator to identify anomalous administrative activity from limited accounts.
How to Mitigate CVE-2026-26053
Immediate Actions Required
- Upgrade Command Centre to a fixed release: vEL9.50.1587(MR1), vEL9.40.3130(MR3), vEL9.30.3983(MR5), or vEL9.20.4349(MR7) as applicable.
- Migrate any deployment running Command Centre 9.10 to a supported, patched branch, as all 9.10 versions remain affected.
- Audit existing operator accounts and remove unused or over-provisioned operator roles to reduce the pool of accounts that could exploit the flaw.
Patch Information
Gallagher has released fixed maintenance releases across the 9.20, 9.30, 9.40, and 9.50 branches. Refer to the Gallagher Security Advisory CVE-2026-26053 for the authoritative patch matrix and upgrade guidance.
Workarounds
- Restrict network access to the Command Centre Server so that only trusted operator workstations can reach its management interfaces.
- Enforce strong authentication and periodic credential rotation for all operator accounts to reduce the risk of credential-based abuse.
- Apply least-privilege review of operator roles, removing any permissions not strictly required for job function until patches are deployed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
