CVE-2021-40444CISA KEVEPSS p99.9%

CVE-2021-40444Microsoft MSHTML Remote Code Execution Vulnerability

Microsoft / MSHTML

Description

Microsoft MSHTML contains a unspecified vulnerability that allows for remote code execution.

Scoring

CVSS 8.8 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L
EPSS97.45% probability of exploitation · percentile 99.9% · 2026-10-02T12:00:20Z
Last modified2026-08-10

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntryMicrosoft MSHTML Remote Code Execution Vulnerabilitykev-cve-2021-404440%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.