ClosedPatched

Microsoft Windows CNG Key Isolation Service: Privilege Escalation (CVE-2023-28229)

Microsoft Windows CNG Key Isolation Service

Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service contains an unspecified vulnerability that allows an attacker to gain specific limited SYSTEM privileges. Added to CISA KEV on 2023-10-04.

Why this severity: CVSS 7.0 (NVD), actively exploited (CISA KEV)

Started: Oct 4, 2023
Closed: Oct 4, 2023
CVE: CVE-2023-28229

Follow this incident

Updated Oct 4, 2023

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Oct 4, 2023
CISA added CVE-2023-28229 to the KEV catalog (due 2023-10-25).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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