PT-2026-145725

CVE-2026-12591

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Published

2026-11-12

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Updated

2026-11-13

Description by

CVSS 3.1
9.9
Critical
MetricsAV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions M365 Manager Plus versions prior to 4818
Description Insufficient permission validation in the delegated administration interface allows an authenticated technician to escalate privileges beyond their intended scope. This flaw can lead to remote code execution during administrative processing and the hijacking of M365 tenants.
Recommendations Upgrade to build 4818 or later.
Exploitability
Fix
Impacts
Vendors
Affected products
Weakness enumeration
CWE-862: Missing Authorization
Related identifiers
CVE-2026-12591
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