Serial number: AV25-819
Date: December 11, 2025
On December 9, 2025, Mozilla published security advisories to address vulnerabilities in the following products:
- Firefox – versions prior to 146
- Firefox ESR – versions prior to 115.31
- Firefox ESR – versions prior to 140.6
- Thunderbird – versions prior to 146
- Thunderbird – versions prior to 140.6
The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.