Mitel security advisory (AV26-734)
Serial number: AV26-734 Date: July 22, 2026 On July 22, 2026, Mitel published security advisories to address vulnerabilities in the following products. Included were critical updates for the following:: MiCollab – multiple versions OpenScape UC – multiple versions The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates. Mitel Product Security Advisory MISA-2026-0006 - MiCollab Command Injection Vulnerability Mitel Product Security Advisory MISA-2026-0007 - OpenScape UC Cross Reflected Site Scripting (XSS) Vulnerability Mitel Security Bulletins
CSIRTS triage
- What
- Critical updates have been published for MiCollab and OpenScape UC.
- Who is affected
- Users of MiCollab and OpenScape UC.
- Urgency
- Remediation is important due to the critical nature of the updates.
- Action
- Apply the necessary updates.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://cyber.gc.ca/en/alerts-advisories/mitel-security-advisory-av26-734
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