CISA-confirmed known exploited vulnerability

CVE-2022-26143

MiCollab, MiVoice Business Express Access Control Vulnerability

Mitel · MiCollab, MiVoice Business Express

Vulnerability details

A vulnerability has been identified in MiCollab and MiVoice Business Express that may allow a malicious actor to gain unauthorized access to sensitive information and services, cause performance degradations or a denial of service condition on the affected system.

Added to CISA KEV: 2022-03-25

Ransomware campaign use: Unknown

CISA due date: 2022-04-15

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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