Is CVE-2023-28229 in the CISA KEV catalog?

Yes. CVE-2023-28229 is on the CISA Known Exploited Vulnerabilities list, added 2023-10-04.

What is the CVSS severity of CVE-2023-28229?

CVE-2023-28229 has a CVSS v3 base score of 7.0 (HIGH).

What is the EPSS score for CVE-2023-28229?

CVE-2023-28229 has an EPSS score of 1.87% (77th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2023-28229

HIGHCISA KEVEPSS 77th pctl

7.0

CVSS v3

NVD

Description

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

CWE-591

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.87%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

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.

Remediation due: 2023-10-25

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-28.