Microsoft Exchange Server Information Disclosure Vulnerability

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Summary

CVECVE-2026-45502
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-09 17:17:26 UTC
Updated2026-06-15 19:24:39 UTC
DescriptionServer-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

Risk And Classification

Primary CVSS: v3.1 5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS: 0.004240000 probability, percentile 0.337420000 (date 2026-06-21)

Problem Types: CWE-918 | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
3.1CNACVSS5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Microsoft Exchange Server 2016 cumulative_update_23 All All
Application Microsoft Exchange Server 2019 cumulative_update_14 All All
Application Microsoft Exchange Server 2019 cumulative_update_15 All All
Application Microsoft Exchange Server Subscription Edition All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 affected 15.01.0.0 15.01.2507.069 custom x64-based Systems
CNA Microsoft Microsoft Exchange Server 2019 Cumulative Update 14 affected 15.02.0.0 15.02.1544.041 custom x64-based Systems
CNA Microsoft Microsoft Exchange Server 2019 Cumulative Update 15 affected 15.02.0.0 15.02.1748.046 custom x64-based Systems
CNA Microsoft Microsoft Exchange Server Subscription Edition RTM affected 15.02.0.0 15.02.2562.043 custom x64-based Systems

References

ReferenceSourceLinkTags
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45502 [email protected] msrc.microsoft.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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