Windows NTLM Spoofing Vulnerability

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Summary

CVECVE-2026-50508
StatePUBLISHED
Assignermicrosoft
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-09 17:17:50 UTC
Updated2026-06-09 19:32:51 UTC
DescriptionExposure of sensitive information to an unauthorized actor in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

Problem Types: CWE-200 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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
High
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Microsoft Windows 10 Version 1607 affected 10.0.14393.0 10.0.14393.9234 custom 32-bit Systems, x64-based Systems
CNA Microsoft Windows 11 Version 22H2 affected 10.0.22621.0 10.0.22631.7219 custom ARM64-based Systems, x64-based Systems
CNA Microsoft Windows Server 2012 affected 6.2.9200.0 6.2.9200.26132 custom x64-based Systems
CNA Microsoft Windows Server 2012 Server Core Installation affected 6.2.9200.0 6.2.9200.26132 custom x64-based Systems
CNA Microsoft Windows Server 2012 R2 affected 6.3.9600.0 6.3.9600.23228 custom x64-based Systems
CNA Microsoft Windows Server 2012 R2 Server Core Installation affected 6.3.9600.0 6.3.9600.23228 custom x64-based Systems
CNA Microsoft Windows Server 2016 affected 10.0.14393.0 10.0.14393.9234 custom x64-based Systems
CNA Microsoft Windows Server 2016 Server Core Installation affected 10.0.14393.0 10.0.14393.9234 custom x64-based Systems
CNA Microsoft Windows Server 2022 affected 10.0.20348.0 10.0.20348.5256 custom x64-based Systems
CNA Microsoft Windows Server Version 2004 affected 10.0.0 10.0.19045.7417 custom x64-based Systems

References

ReferenceSourceLinkTags
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50508 [email protected] msrc.microsoft.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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