Is CVE-2023-21766 in the CISA KEV catalog?

No. CVE-2023-21766 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-21766?

CVE-2023-21766 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2023-21766?

CVE-2023-21766 has an EPSS score of 0.87% (54th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-21766?

Install KB5022297 for Windows 10. Fixes are available for 14 affected products.

CVE & CISA-KEV Catalog

CVE-2023-21766

MEDIUM

4.7

CVSS v3

NVD

Description

Windows Overlay Filter Information Disclosure Vulnerability

CWE-591 CWE-362Race Condition

How to fix

Remediation Available

Windows 10Windows

Install:KB5022297Microsoft

Windows 10 Version 1607Windows

Install:KB5022289Microsoft

Windows 10 Version 1809Windows

Install:KB5022286Microsoft

Windows 10 Version 20H2Windows

Install:KB5022282Microsoft

Windows 10 Version 21H2Windows

Install:KB5022282Microsoft

Windows 10 Version 22H2Windows

Install:KB5022282Microsoft

Windows 11 Version 22H2Windows

Install:KB5022303Microsoft

Windows 11 version 21H2Windows

Install:KB5022287Microsoft

Windows Server 2016Windows

Install:KB5022289Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5022289Microsoft

Windows Server 2019Windows

Install:KB5022286Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5022286Microsoft

Windows Server 2022Windows

Install:KB5022291Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5022291Microsoft

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.87%probability of exploitation in 30 days

54thpercentile

Moderate risk: more likely to be exploited than 54% of all known CVEs.

References

Other references1

msrc.microsoft.com

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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 2024-11-21.