VulnerabilityModified

CVE-2021-34446

Windows HTML Platforms Security Feature Bypass Vulnerability

HIGH 8.0EPSS 2.04%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.04%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Windows HTML Platforms Security Feature Bypass Vulnerability

CVSS 3.1: 8.0 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS: 2.04% probability · 80th percentile
CISA KEV: Not listed
Affected: microsoft/windows 10 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019
Source: secure@microsoft.com

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34446
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34446Patch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.