Jun 2026: Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2026-45583 Published on June 9, 2026
Microsoft Exchange Server Remote Code Execution Vulnerability
Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
Weakness Type
What is a Code Injection Vulnerability?
The software constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
CVE-2026-45583 has been classified to as a Code Injection vulnerability or weakness.
Products Associated with CVE-2026-45583
Want to know whenever a new CVE is published for Microsoft products? stack.watch will email you.
Affected Versions
Microsoft Exchange Server 2016 Cumulative Update 23:- Version 15.01.0.0 and below 15.01.2507.069 is affected.
- Version 15.02.0.0 and below 15.02.1544.041 is affected.
- Version 15.02.0.0 and below 15.02.1748.046 is affected.
- Version 15.02.0.0 and below 15.02.2562.043 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.