Authenticated information disclosure via server-side request forgery
Published Jun 9, 2026 · Updated Jun 9, 2026
Server-side request forgery in Microsoft Exchange Server affected builds allows remote authenticated users to disclose information over a network. Microsoft has not disclosed the vulnerable request-handling component or how it selects and sends requests to attacker-influenced destinations. Exploitation requires an authorized network user and is limited to reading information returned through the server-side request, with no reported write or service-interruption impact.
Summary
What happened
Server-side request forgery in Microsoft Exchange Server affected builds allows remote authenticated users to disclose information over a network. Microsoft has not disclosed the vulnerable request-handling component or how it selects and sends requests to attacker-influenced destinations. Exploitation requires an authorized network user and is limited to reading information returned through the server-side request, with no reported write or service-interruption impact.
The record
- CVE
- CVE-2026-45502
- Published
- Jun 9, 2026
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Microsoft Exchange Server 2019 Cumulative Update 14
- Classifications
- CWE-918
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 9, 2026CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.02.0.0 <15.02.1544.041
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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