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Fencer Vulns
medium 4.8

CVE-2026-50684 json

Active Directory Federation Server Spoofing Vulnerability

published 2026-07-14 3 mo ago modified 2026-11-01 7 d ago also EUVD-2026-44134

cvss
4.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

Improper neutralization of input during web page generation ('cross-site scripting') in Active Directory Federation Services (AD FS) allows an authorized attacker to perform spoofing over a network.

Patch / fix

  • Microsoft Windows 10 Version 1607 10.0.14393.9339
  • Microsoft Windows 10 Version 1809 10.0.17763.9020
  • Microsoft Windows Server 2012 6.2.9200.26226
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.26226
  • Microsoft Windows Server 2012 R2 6.3.9600.23291
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.23291
  • Microsoft Windows Server 2016 10.0.14393.9339
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9339
  • Microsoft Windows Server 2019 10.0.17763.9020
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.9020
  • Microsoft Windows Server 2022 10.0.20348.5386
  • Microsoft Windows Server 2025 10.0.26100.33158
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33158

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C
CNA 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

  • Microsoft Windows 10 Version 1607
  • Microsoft Windows 10 Version 1809
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 (Server Core installation)
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.