Sep 2026: Microsoft Exchange Server Tampering Vulnerability
CVE-2026-69375 Published on September 8, 2026
Microsoft Exchange Server Tampering Vulnerability
Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to perform tampering over a network.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-69375 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-69375
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Affected Versions
Microsoft Exchange Server 2016 Cumulative Update 23:- Version 15.01.0.0 and below 15.01.2507.073 is affected.
- Version 15.02.0.0 and below 15.02.1544.046 is affected.
- Version 15.02.0.0 and below 15.02.1748.051 is affected.
- Version 15.02.0.0 and below 15.02.2562.049 is affected.