Zoho ManageEngine M365 Manager Plus PrivEsc via Delegated Admin RCE
CVE-2026-12591 Published on November 12, 2026
Privilege Escalation
Zohocorp ManageEngine M365 Manager Plus versions below 4818 is affected by an authenticated technician may exploit insufficient permission validation in the delegated administration interface to escalate privileges beyond their intended scope, which could result in remote code execution during administrative processing.
Vulnerability Analysis
CVE-2026-12591 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-12591 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-12591
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Affected Versions
Zohocorp M365 Manager Plus:- Before 4818 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.