CVE-2025-64734: Gallagher t21 Reader

Low severity, CVSS 2.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Missing Release of Resource after Effective Lifetime (CWE-772) in the T21 Reader allows an attacker with physical access to the Reader to perform a denial-of-service attack against that specific reader, preventing cardholders from badging for entry. This issue affects Command Centre Server: 9.30 prior to vCR9.30.251028a (distributed in 9.30.2881 (MR3)), 9.20 prior to vCR9.20.251028a (distributed in 9.20.3265 (MR5)), 9.10 prior to vCR9.10.251028a (distributed in 9.10.4135 (MR8)),  all versions of 9.00 and prior.

Affected products

• Gallagher t21 Reader: up to and including 9.00

Published 2025-11-18. Last modified 2026-06-17.