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CVE-2023-28229

Microsoft Windows CNG Key Isolation Service Privilege Escalation

7.0 HIGHActively exploited (CISA KEV)EPSS 1.67%
  1. Published11 Apr 2023
  2. Added to CISA KEV4 Oct 2023
  3. Remediation due25 Oct 2023
Actively exploited (CISA KEV)

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 KEV: 4 Oct 2023Federal remediation due: 25 Oct 2023

Description

Windows CNG Key Isolation Service Elevation of Privilege Vulnerability

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityHigh
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1507< 10.0.10240.19869
Microsoft Windows 10 1607< 10.0.14393.5850
Microsoft Windows 10 1809< 10.0.17763.4252
Microsoft Windows 10 20h2< 10.0.19042.2846
Microsoft Windows 10 21h2< 10.0.19044.2846
Microsoft Windows 10 22h2< 10.0.19045.2846
Microsoft Windows 11 21h2< 10.0.22000.1817
Microsoft Windows 11 22h2< 10.0.22621.1555
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016all versions
Microsoft Windows Server 2019all versions
Microsoft Windows Server 2022all versions

Remediation

Fixed in
Microsoft Windows 10 1507≥ 10.0.10240.19869
Microsoft Windows 10 1607≥ 10.0.14393.5850
Microsoft Windows 10 1809≥ 10.0.17763.4252
Microsoft Windows 10 20h2≥ 10.0.19042.2846
Microsoft Windows 10 21h2≥ 10.0.19044.2846
Microsoft Windows 10 22h2≥ 10.0.19045.2846
Microsoft Windows 11 21h2≥ 10.0.22000.1817
Microsoft Windows 11 22h2≥ 10.0.22621.1555

References

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Frequently asked

Is CVE-2023-28229 being actively exploited?

Yes. CVE-2023-28229 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 4 Oct 2023.

How severe is CVE-2023-28229?

CVE-2023-28229 has a CVSS 3.1 base score of 7.0, rated high. EPSS estimates a 1.67% probability of exploitation.

Which products are affected by CVE-2023-28229?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 20h2, Microsoft Windows 10 21h2, and 8 more.

How do I fix CVE-2023-28229?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1507 10.0.10240.19869, Microsoft Windows 10 1607 10.0.14393.5850, Microsoft Windows 10 1809 10.0.17763.4252 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-28229 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.