Jun 2026: Microsoft Exchange Server Information Disclosure Vulnerability
CVE-2026-45502 Published on June 9, 2026
Microsoft Exchange Server Information Disclosure Vulnerability
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-45502 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-45502
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.