Is CVE-2021-34446 in the CISA KEV catalog?

No. CVE-2021-34446 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34446?

CVE-2021-34446 has a CVSS v3 base score of 8.0 (HIGH).

What is the EPSS score for CVE-2021-34446?

CVE-2021-34446 has an EPSS score of 1.76% (75th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34446?

Install KB5004249 for Windows 10. Fixes are available for 16 affected products.

CVE & CISA-KEV Catalog

CVE-2021-34446

HIGHEPSS 75th pctl

8.0

CVSS v3

NVD

Description

Windows HTML Platforms Security Feature Bypass Vulnerability

How to fix

Remediation Available

Windows 10Windows

Install:KB5004249Microsoft

Windows 10 Version 1607Windows

Install:KB5004238Microsoft

Windows 10 Version 1809Windows

Install:KB5004244Microsoft

Windows 10 Version 1909Windows

Install:KB5004245Microsoft

Windows 10 Version 2004Windows

Install:KB5004237Microsoft

Windows 10 Version 20H2Windows

Install:KB5004237Microsoft

Windows 10 Version 21H1Windows

Install:KB5004237Microsoft

Windows 7Windows

Install:KB5004289Microsoft

Install:KB5005563Microsoft

Windows 8.1Windows

Install:KB5004298Microsoft

Install:KB5005563Microsoft

Windows RT 8.1Windows

Install:KB5004298

Windows Server 2008Windows

Install:KB5005563Microsoft

Install:KB5004305Microsoft

Windows Server 2008 R2Windows

Install:KB5005563Microsoft

Install:KB5004289Microsoft

Windows Server 2012Windows

Install:KB5005563Microsoft

Install:KB5004294Microsoft

Windows Server 2012 R2Windows

Install:KB5005563Microsoft

Install:KB5004298Microsoft

Windows Server 2016Windows

Install:KB5004238Microsoft

Windows Server 2019Windows

Install:KB5004244Microsoft

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

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.76%probability of exploitation in 30 days

75thpercentile

Elevated risk: more likely to be exploited than 75% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Embed a live status badge for CVE-2021-34446

Markdown

[![CVE-2021-34446](https://tridentstack.com/cve/badge/CVE-2021-34446.svg)](https://tridentstack.com/cve/CVE-2021-34446)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-34446"><img src="https://tridentstack.com/cve/badge/CVE-2021-34446.svg" alt="CVE-2021-34446"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.