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Fencer Intel
medium 5.5

CVE-2026-122162 json

Windows Update Stack Information Disclosure Vulnerability

published yesterday modified 17h ago also EUVD-2026-122485

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

Integer underflow (wrap or wraparound) in Windows Update Stack allows an authorized attacker to disclose information locally.

Patch / fix

  • Microsoft Windows 11 Version 24H2 10.0.26100.9974
  • Microsoft Windows 11 Version 25H2 10.0.26200.9974
  • Microsoft Windows 11 version 26H1 10.0.28000.3501
  • Microsoft Windows 11 Version 26H2 10.0.26300.9974
  • Microsoft Windows Server 2025 10.0.26100.33822
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33822

Is CVE-2026-122162 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
yesterday

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows 11 version 26H1
  • Microsoft Windows 11 Version 26H2
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound)
  • CWE-125 Out-of-bounds Read

References

Sources

Fencer Intel 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.