---
id: CVE-2026-50508
title: Windows NTLM Spoofing Vulnerability
summary: >-
  Exposure of sensitive information to an unauthorized actor in Windows NTLM
  allows an unauthorized attacker to perform spoofing over a network.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-200
vendor: Microsoft
product: Windows 10 Version 1607
affected:
  - windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9234
  - windows_11_version_22h2 >= 10.0.22621.0 < 10.0.22631.7219
  - windows_server_2012 >= 6.2.9200.0 < 6.2.9200.26132
  - windows_server_2012_server_core_installation >= 6.2.9200.0 < 6.2.9200.26132
  - windows_server_2012_r2 >= 6.3.9600.0 < 6.3.9600.23228
  - >-
    windows_server_2012_r2_server_core_installation >= 6.3.9600.0 <
    6.3.9600.23228
  - windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9234
  - >-
    windows_server_2016_server_core_installation >= 10.0.14393.0 <
    10.0.14393.9234
  - windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5256
  - windows_server_version_2004 >= 10.0.0 < 10.0.19045.7417
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-09T18:02:47.315449Z'
published: '2026-06-09'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T13:44:13.855Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-50508'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50508'
    label: Windows NTLM Spoofing Vulnerability
tags:
  - cve.org
epss: 0.08678
epssPercentile: 0.9489
ingestedAt: '2026-09-24T14:44:21.407Z'
---

## Overview

Exposure of sensitive information to an unauthorized actor in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.

## Affected

- `windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9234`
- `windows_11_version_22h2 >= 10.0.22621.0 < 10.0.22631.7219`
- `windows_server_2012 >= 6.2.9200.0 < 6.2.9200.26132`
- `windows_server_2012_server_core_installation >= 6.2.9200.0 < 6.2.9200.26132`
- `windows_server_2012_r2 >= 6.3.9600.0 < 6.3.9600.23228`
- `windows_server_2012_r2_server_core_installation >= 6.3.9600.0 < 6.3.9600.23228`
- `windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9234`
- `windows_server_2016_server_core_installation >= 10.0.14393.0 < 10.0.14393.9234`
- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5256`
- `windows_server_version_2004 >= 10.0.0 < 10.0.19045.7417`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.