CVE-2025-41402 is a vulnerability classified under CWE-602, which concerns the improper reliance on client-side enforcement of security controls that should be validated server-side. In Gallagher's Command Centre Server, this flaw allows a privileged operator to input invalid competency data that bypasses expiry checks designed to ensure that operator competencies are current and valid. The affected versions include all releases of 9.00 and prior, as well as versions 9.10, 9.20, and 9.30 before their respective maintenance releases (MR7, MR4, MR2). The vulnerability arises because the server trusts client-side validation, which can be circumvented by manipulating the client input, thereby undermining the integrity of competency data. This can lead to unauthorized extension of operator privileges beyond their legitimate expiry, potentially allowing continued access or operations that should have been revoked. The CVSS v3.1 score is 5.5 (medium), reflecting that exploitation requires local access with low complexity and privileges but no user interaction. The impact is primarily on data integrity, with no direct confidentiality or availability consequences. No public exploits are known, and no patches are linked yet, indicating a need for vigilance and prompt remediation once patches are released.

For European organizations, especially those relying on Gallagher Command Centre Server for physical security management, this vulnerability poses a risk of unauthorized extension of operator privileges. This can lead to insider threats where operators retain or escalate access beyond their authorized period, potentially compromising physical security controls and access logs. The integrity of competency data is critical for compliance and audit purposes; thus, manipulation could undermine regulatory adherence and increase liability. While confidentiality and availability are not directly impacted, the breach of integrity can facilitate further malicious activities or unauthorized access to sensitive facilities. Organizations in sectors such as critical infrastructure, government, transportation, and large enterprises with strict physical security requirements are particularly vulnerable. The medium severity suggests a moderate risk that should be addressed promptly to prevent exploitation by insiders or attackers with privileged access.

Organizations should implement the following specific mitigations: 1) Apply vendor patches immediately upon release to ensure server-side validation is enforced correctly. 2) Restrict privileged operator access strictly on a need-to-know basis and monitor operator activities for anomalies related to competency data changes. 3) Implement additional server-side validation controls or custom scripts to verify competency expiry independently of client input. 4) Conduct regular audits of competency data and access logs to detect unauthorized modifications. 5) Employ network segmentation and access controls to limit the ability of operators to manipulate the Command Centre Server from unauthorized endpoints. 6) Train security personnel to recognize and respond to potential misuse of operator privileges. 7) Engage with Gallagher support to confirm patch availability and best practices for secure configuration. These steps go beyond generic advice by focusing on operational controls and compensating technical measures until patches are deployed.