CVE-2021-32071: Mitel MiCollab

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

The MiCollab Client service in Mitel MiCollab before 9.3 could allow an unauthenticated user to gain system access due to improper access control. A successful exploit could allow an attacker to view and modify application data, and cause a denial of service for users.

Affected products

• Mitel MiCollab: before 9.3 (fixed in 9.3)

Published 2021-08-13. Last modified 2026-06-17.