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Fencer Intel
high 7.0

CVE-2026-103571 json

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

published yesterday modified 17h ago also EUVD-2026-122060

cvss
7.0
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 18%
public exploits
0
none known

Summary

An elevation of privilege vulnerability exists when the Windows Cryptography Next Generation (CNG) Key Isolation service improperly handles memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context. To exploit this vulnerability, an attacker would first have to gain execution on the victim system. An attacker could then run a specially crafted application to elevate privileges. The security update addresses the vulnerability by correcting how the Windows CNG Key Isolation Service handles memory.

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

0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/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.