CVE-2021-33771CISA KEVEPSS p95.5%

CVE-2021-33771Microsoft Windows Kernel Privilege Escalation Vulnerability

Microsoft / Windows

Description

Microsoft Windows kernel contains an unspecified vulnerability that allows for privilege escalation.

Scoring

CVSS 7.8 ()
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS10.17% probability of exploitation · percentile 95.5% · 2026-10-06T12:00:23Z
Last modified2026-08-10

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntryMicrosoft Windows Kernel Privilege Escalation Vulnerabilitykev-cve-2021-337710%live

Related by meaning· 4

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

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Microsoft Win32k Privilege Escalation Vulnerability
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CVE-2025-33067
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CVE-2026-40369
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Microsoft Windows Win32k Privilege Escalation Vulnerability
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.