Mitel security advisory (AV25-251)

Serial number: AV25-251
Date: May 7, 2025

On May 7, 2025, Mitel published security advisories to address critical vulnerabilities in the following products:

• Mitel 6800 Series SIP Phones – version R6.4.0.SP4 and prior
• Mitel 6900 Series SIP Phones – version R6.4.0.SP4 and prior
• Mitel 6900w Series SIP Phones – version R6.4.0.SP4 and prior
• Mitel 6970 Conference Unit – version R6.4.0.SP4 and prior

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

• Mitel Security Advisory - 2025-0004
• Mitel Security Bulletins