Is CVE-2021-31958 in the CISA KEV catalog?

No. CVE-2021-31958 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31958?

CVE-2021-31958 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-31958?

CVE-2021-31958 has an EPSS score of 2.66% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-31958?

Install KB5003687 for Windows 10. Fixes are available for 22 affected products.

CVE & CISA-KEV Catalog

CVE-2021-31958

HIGHEPSS 84th pctl

7.5

CVSS v3

NVD

Description

Windows NTLM Elevation of Privilege Vulnerability

CWE-294

How to fix

Remediation Available

Windows 10Windows

Install:KB5003687Microsoft

Windows 10 Version 1607Windows

Install:KB5003638Microsoft

Windows 10 Version 1809Windows

Install:KB5003646Microsoft

Windows 10 Version 1909Windows

Install:KB5003635Microsoft

Windows 10 Version 2004Windows

Install:KB5003637Microsoft

Windows 10 Version 20H2Windows

Install:KB5003637Microsoft

Windows 10 Version 21H1Windows

Install:KB5003637Microsoft

Windows 7Windows

Install:KB5003667Microsoft

Install:KB5003694Microsoft

Windows 8.1Windows

Install:KB5003671Microsoft

Install:KB5003681Microsoft

Windows RT 8.1Windows

Install:KB5003671

Windows Server 2008Windows

Install:KB5003661Microsoft

Install:KB5003695Microsoft

Windows Server 2008 R2Windows

Install:KB5003694Microsoft

Install:KB5003667Microsoft

Windows Server 2012Windows

Install:KB5003696Microsoft

Install:KB5003697Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5003696Microsoft

Install:KB5003697Microsoft

Windows Server 2012 R2Windows

Install:KB5003681Microsoft

Install:KB5003671Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5003671Microsoft

Install:KB5003681Microsoft

Windows Server 2016Windows

Install:KB5003638Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5003638Microsoft

Windows Server 2019Windows

Install:KB5003646Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5003646Microsoft

Windows Server, version 2004 (Server Core installation)Windows

Install:KB5003637Microsoft

Windows Server, version 20H2 (Server Core Installation)Windows

Install:KB5003637Microsoft

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 VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.66%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Patch1

portal.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.