CVE-2021-33742

HIGH KEV

Windows MSHTML Platform - Remote Code Execution via Out-of-bounds Write

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-33742 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 3, 2021.

Description

Windows MSHTML Platform Remote Code Execution Vulnerability

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.7212
EPSS Percentile 98.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable no
Technical Impact total

Details

CISA KEV 2021-11-03
VulnCheck KEV 2021-06-03
InTheWild.io 2021-06-03
ENISA EUVD EUVD-2021-20419
CWE
CWE-787
Status published
Products (16)
microsoft/windows_10_1507 < 10.0.10240.18967
microsoft/windows_10_1607 < 10.0.14393.4467
microsoft/windows_10_1809 < 10.0.17763.1999
microsoft/windows_10_1909 < 10.0.18363.1621
microsoft/windows_10_2004 < 10.0.19041.1052
microsoft/windows_10_20h2 < 10.0.19042.1052
microsoft/windows_10_21h1 < 10.0.19043.1052
microsoft/windows_7
microsoft/windows_8.1
microsoft/windows_rt_8.1
... and 6 more
Published Jun 08, 2021
KEV Added Nov 03, 2021
Tracked Since Feb 18, 2026