How severe is CVE-2023-28229?

CVE-2023-28229 has a CVSS 3.1 base score of 7 (HIGH). EPSS estimates a 1.7% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2023-28229: Windows CNG Key Isolation Service Elevation of

CISA Known Exploited Vulnerabilities

Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2023-10-04

Remediation due

2023-10-25

Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-28229; https://nvd.nist.gov/vuln/detail/CVE-2023-28229

Description

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

Severity

CVSS 3.1 · CNA7 HIGH

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

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Exploitation Context

as of October 17, 2026

All KEV statistics→

CISA added CVE-2023-28229 to the KEV catalog 176 days after its CVE record was published. The median for entries added in 2023 is 12 days.
It is one of 391 Microsoft entries in the CISA KEV catalog, and one of 27 added in 2023.
Its current EPSS score (1.7%) is higher than that of 7% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
Microsoft	Microsoft Windows 10 Version 1809	10.0.17763.0 to <10.0.17763.4252
Microsoft	Microsoft Windows 10 Version 1809	10.0.0 to <10.0.17763.4252
Microsoft	Microsoft Windows Server 2019	10.0.17763.0 to <10.0.17763.4252
Microsoft	Microsoft Windows Server 2019 (Server Core installation)	10.0.17763.0 to <10.0.17763.4252
Microsoft	Microsoft Windows Server 2022	10.0.20348.0 to <10.0.20348.1668
Microsoft	Microsoft Windows 10 Version 20H2	10.0.0 to <10.0.19042.2846
Microsoft	Microsoft Windows 11 version 21H2	10.0.0 to <10.0.22000.1817
Microsoft	Microsoft Windows 10 Version 21H2	10.0.19043.0 to <10.0.19044.2846
Microsoft	Microsoft Windows 11 version 22H2	10.0.22621.0 to <10.0.22621.1555
Microsoft	Microsoft Windows 10 Version 22H2	10.0.19045.0 to <10.0.19045.2846
Microsoft	Microsoft Windows 10 Version 1507	10.0.10240.0 to <10.0.10240.19869
Microsoft	Microsoft Windows 10 Version 1607	10.0.14393.0 to <10.0.14393.5850
Microsoft	Microsoft Windows Server 2016	10.0.14393.0 to <10.0.14393.5850
Microsoft	Microsoft Windows Server 2016 (Server Core installation)	10.0.14393.0 to <10.0.14393.5850
Microsoft	Microsoft Windows Server 2008 Service Pack 2	6.0.6003.0 to <6.0.6003.22015
Microsoft	Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.6003.0 to <6.0.6003.22015
Microsoft	Microsoft Windows Server 2008 Service Pack 2	6.0.6003.0 to <6.0.6003.22015
Microsoft	Microsoft Windows Server 2008 R2 Service Pack 1	6.1.7601.0 to <6.1.7601.26466
Microsoft	Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.1.7601.0 to <6.1.7601.26466
Microsoft	Microsoft Windows Server 2012	6.2.9200.0 to <6.2.9200.24216
Microsoft	Microsoft Windows Server 2012 (Server Core installation)	6.2.9200.0 to <6.2.9200.24216
Microsoft	Microsoft Windows Server 2012 R2	6.3.9600.0 to <6.3.9600.20919
Microsoft	Microsoft Windows Server 2012 R2 (Server Core installation)	6.3.9600.0 to <6.3.9600.20919

References

1 Links

Vendor advisories

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

Record Details

Published

2023-04-11

Last updated

2025-10-21

Assigner (CNA)

microsoft

Credited to

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Tool categories

Data Security Software

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.

CVE-2023-28229