Is CVE-2021-34439 in the CISA KEV catalog?

No. CVE-2021-34439 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-34439?

CVE-2021-34439 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-34439?

CVE-2021-34439 has an EPSS score of 2.50% (83th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-34439?

Install KB5004249 for Windows 10. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-34439

HIGHEPSS 83th pctl

7.8

CVSS v3

NVD

Description

Microsoft Windows Media Foundation Remote Code Execution Vulnerability

How to fix

Remediation Available

Windows 10Windows

Install:KB5004249Microsoft

Windows 10 Version 1607Windows

Install:KB5004238Microsoft

Windows Server 2016Windows

Install:KB5004238Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5004238Microsoft

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 ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.50%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Embed a live status badge for CVE-2021-34439

Markdown

[![CVE-2021-34439](https://tridentstack.com/cve/badge/CVE-2021-34439.svg)](https://tridentstack.com/cve/CVE-2021-34439)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-34439"><img src="https://tridentstack.com/cve/badge/CVE-2021-34439.svg" alt="CVE-2021-34439"></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.