Resource Management Flaw in T21 Reader by Gallagher Affects Access Control Systems

CVE-2025-64734

What is CVE-2025-64734?

A resource management vulnerability in Gallagher's T21 Reader can allow attackers with physical access to execute a denial-of-service attack. By exploiting this flaw, the attacker can disrupt the normal operation of the Reader, preventing cardholders from gaining entry through the access control system. This issue affects multiple versions of the Command Centre Server, particularly those prior to specific version updates. Organizations utilizing the T21 Reader should evaluate their systems and apply the necessary updates to mitigate this risk.

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