Microsoft Exchange Server Spoofing Vulnerability

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Summary

CVECVE-2026-47631
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-09 17:17:35 UTC
Updated2026-06-15 14:19:47 UTC
DescriptionImproper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

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

EPSS: 0.000650000 probability, percentile 0.204600000 (date 2026-06-14)

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
3.1CNACVSS8.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Microsoft Exchange Server All All All All
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

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-2026-47631 [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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