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CVE-2023-28229

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

High7.0Known exploitedPublic exploitEPSS 1.7%
Published
Updated
Reserved
Assigned by
microsoft

Description

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

Exploited in the wild

CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability.

Added
4 Oct 2023
Fix due (US federal)
25 Oct 2023
Used by ransomware
Not known

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

Public exploit

An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.

Timeline

  1. ID reserved

    By microsoft

  2. · 29 days later

    Published

  3. · 6 months later

    Added to CISA KEV

    Known exploited in the wild

  4. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-28229, by who scored it
Scored byCVSSScoreVector
microsoftCNA (assigner)3.1High7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
NVDNVD · Analyzed3.1High7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
1.7% · top 23% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: active · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.

Weakness

Affected products

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2023-28229 badge
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Record last updated .