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Fencer Intel
high 7.8

CVE-2026-100223 json

Windows NTFS Elevation of Privilege Vulnerability

published yesterday modified 17h ago also EUVD-2026-121566

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

An elevation of privilege vulnerability exists when reparse points are created by sandboxed processes allowing sandbox escape. An attacker who successfully exploited the vulnerability could use the sandbox escape to elevate privileges on an affected system. To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system. The security update addresses the vulnerability by preventing sandboxed processes from creating reparse points targeting inaccessible files.

Patch / fix

  • Microsoft Windows 10 Version 1607 10.0.14393.9688
  • Microsoft Windows 10 Version 1809 10.0.17763.9487
  • Microsoft Windows 10 Version 21H2 10.0.19044.7846
  • Microsoft Windows 10 Version 22H2 10.0.19045.7846
  • Microsoft Windows 11 version 23H2 10.0.22631.7711
  • 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 2016 10.0.14393.9688
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9688
  • Microsoft Windows Server 2019 10.0.17763.9487
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.9487
  • Microsoft Windows Server 2022 10.0.20348.5870
  • Microsoft Windows Server 2025 10.0.26100.33822
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33822

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
yesterday

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows 10 Version 1607
  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows 11 version 26H1
  • Microsoft Windows 11 Version 26H2
  • 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

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.