Is CVE-2021-40476 in the CISA KEV catalog?

No. CVE-2021-40476 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-40476?

CVE-2021-40476 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-40476?

CVE-2021-40476 has an EPSS score of 2.27% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-40476?

Install KB5006675 for Windows 10. Fixes are available for 22 affected products.

CVE & CISA-KEV Catalog

CVE-2021-40476

HIGHEPSS 81th pctl

7.5

CVSS v3

NVD

Description

Windows AppContainer Elevation Of Privilege Vulnerability

CWE-522

How to fix

Remediation Available

Windows 10Windows

Install:KB5006675Microsoft

Windows 10 Version 1607Windows

Install:KB5006669Microsoft

Windows 10 Version 1809Windows

Install:KB5006672Microsoft

Windows 10 Version 1909Windows

Install:KB5006667Microsoft

Windows 10 Version 2004Windows

Install:KB5006670Microsoft

Windows 10 Version 20H2Windows

Install:KB5006670Microsoft

Windows 10 Version 21H1Windows

Install:KB5006670Microsoft

Windows 11 version 21H2Windows

Install:KB5006674Microsoft

Windows 8.1Windows

Install:KB5006714Microsoft

Install:KB5006729Microsoft

Windows RT 8.1Windows

Install:KB5006714Microsoft

Windows Server 2012Windows

Install:KB5006732Microsoft

Install:KB5006739Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5006739Microsoft

Install:KB5006732Microsoft

Windows Server 2012 R2Windows

Install:KB5006714Microsoft

Install:KB5006729Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5006729Microsoft

Install:KB5006714Microsoft

Windows Server 2016Windows

Install:KB5006669Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5006669Microsoft

Windows Server 2019Windows

Install:KB5006672Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5006672Microsoft

Windows Server 2022Windows

Install:KB5006699Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5006699Microsoft

Windows Server, version 2004 (Server Core installation)Windows

Install:KB5006670Microsoft

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

Install:KB5006670Microsoft

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 InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.27%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Third-Party Advisory1

packetstormsecurity.com

Related Vulnerabilities

Other CWE-522 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-17662	Critical	9.8	97%	-	-
CVE-2020-29583	Critical	9.8	90%	KEV	-
CVE-2021-30116	Critical	10.0	86%	KEV + Ransom	Fix
CVE-2024-44000	Critical	9.8	83%	-	Fix
CVE-2018-9160	Critical	9.8	77%	-	-
CVE-2017-9248	Critical	9.8	75%	KEV	Fix

Embed a live status badge for CVE-2021-40476

Markdown

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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.