Missing Authentication for Critical Function in MiCollab and MiVoice Business Solution Virtual Instance (MiVB SVI) - #VU134869
Published: June 18, 2026
Vulnerability identifier: #VU134869
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mitel
Affected software:
MiCollab
MiVoice Business Solution Virtual Instance (MiVB SVI)
MiCollab
MiVoice Business Solution Virtual Instance (MiVB SVI)
Detailed vulnerability description
The vulnerability allows a remote attacker to view, corrupt, or delete system configurations.
The vulnerability exists due to missing authentication mechanisms in the MiCollab Client Service component when handling requests. A remote attacker can send a specially crafted request to view, corrupt, or delete system configurations.
Remediation
Install security update from vendor's website.