CISA KEV · Known exploitedHigh

CVE-2023-28229

Microsoft Windows CNG Key Isolation Service

CVE-2023-28229 affects Microsoft Windows CNG Key Isolation Service. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS: 7
EPSS: 1.87%
CISA KEV: Listed
Published: 2023.04.12

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability1.87%

Technical severityCVSS 7

Vulnerability overview

Affected product and versions

Product: Microsoft Windows CNG Key Isolation Service
Affected versions: 10.0.17763.0, 10.0.0, 10.0.20348.0, 10.0.19043.0, 10.0.22621.0, 10.0.19045.0, 10.0.10240.0, 10.0.14393.0, 6.0.6003.0, 6.1.7601.0, 6.2.9200.0, 6.3.9600.0, < 10.0.10240.19869, < 10.0.14393.5850, < 10.0.17763.4252, < 10.0.19042.2846, < 10.0.19044.2846, < 10.0.19045.2846, < 10.0.22000.1817, < 10.0.22621.1555
Fixed versions: 10.0.10240.19869, 10.0.14393.5850, 10.0.17763.4252, 10.0.19042.2846, 10.0.19044.2846, 10.0.19045.2846, 10.0.22000.1817, 10.0.22621.1555

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

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

Due date: 2023.10.25

1
Identify
Confirm that Microsoft Windows CNG Key Isolation Service and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-591
KEV added: 2023.10.04
Ransomware use: 미확인