CVE-2023-28229

HIGH7.0

CISA KEV

Published 2023-04-11 · Updated 2026-06-17 · Source secure@microsoft.com

Summary

CVE-2023-28229 is a high-severity (CVSS 7.0) vulnerability in Microsoft Windows CNG Key Isolation Service. CISA added it to the Known Exploited Vulnerabilities catalog on October 4, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by October 25, 2023. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-591

CISA Known-Exploited Vulnerability

Product: Microsoft — Windows CNG Key Isolation Service

Name: Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability

Date added: 2023-10-04 · Due: 2023-10-25

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

References

View on NVD

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