CVE-2023-28229
Published: October 4, 2023
Official Description
Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service contains an unspecified vulnerability that allows an attacker to gain specific limited SYSTEM privileges.
CISA KEV Advisory
Microsoft Windows CNG Key Isolation Service Privilege Escalation Vulnerability
Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service contains an unspecified vulnerability that allows an attacker to gain specific limited SYSTEM privileges.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This unspecified vulnerability in the Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service allows an attacker to gain specific limited SYSTEM privileges. Its inclusion in CISA's KEV catalog and an EPSS score of 0.07158 confirm active exploitation and a high likelihood of future attacks.
This vulnerability is actively exploited in the wild, as confirmed by its presence in CISA's KEV catalog. Exploitation typically requires local access to the affected system.
Install the latest security updates from Microsoft to patch the Windows CNG Key Isolation Service. Implement strong access controls and monitor for unusual activity related to cryptographic services.
Technical Analysis
CVE-2023-28229 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2023-28229 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-28229 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1