Jul 2026: Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2026-55006 Published on July 14, 2026
Microsoft Exchange Server Elevation of Privilege Vulnerability
Insufficient granularity of access control in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
Weakness Type
Insufficient Granularity of Access Control
The product implements access controls via a policy or other feature with the intention to disable or restrict accesses (reads and/or writes) to assets in a system from untrusted agents. However, implemented access controls lack required granularity, which renders the control policy too broad because it allows accesses from unauthorized agents to the security-sensitive assets.
Products Associated with CVE-2026-55006
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Affected Versions
Microsoft Exchange Server 2016 Cumulative Update 23:- Version 15.01.0.0 and below 15.01.2507.071 is affected.
- Version 15.02.0.0 and below 15.02.1544.043 is affected.
- Version 15.02.0.0 and below 15.02.1748.048 is affected.
- Version 15.02.0.0 and below 15.02.2562.045 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.