Is CVE-2021-1732 actively exploited?

Yes. KEV Intelligence tracks CVE-2021-1732 as a known exploited vulnerability. Confidence is confirmed.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence has not yet recorded sensor-observed exploitation attempts for CVE-2021-1732. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2021-1732 affects Microsoft Windows 10 Version 1803 and 10 other products. KEV Intelligence lists 10 version rows; examples include 10.0.0 to < publication.

Yes. CVE-2021-1732 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

CVE-2021-1732 Exploited in the Wild — Windows 10 Version 1803, Windows 10 Version 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 1909, Windows Server, version 1909 (Server Core installation), Windows 10 Version 2004, Windows Server version 2004, Windows 10 Version 20H2, Windows Server version 20H2

Q: What is CVE-2021-1732?

CVE-2021-1732 is Windows Win32k Elevation of Privilege Vulnerability affecting Microsoft Windows 10 Version 1803 and 10 other products.

Q: How should organizations remediate it?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Q: Is it in CISA KEV?

Yes. CVE-2021-1732 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2021-1732 is Windows Win32k Elevation of Privilege Vulnerability affecting Microsoft Windows 10 Version 1803 and 10 other products.

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Microsoft / Windows 10 Version 1803 affected before publication.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Windows Win32k Elevation of Privilege Vulnerability

Vendor Product Affected Status

Microsoft Windows 10 Version 1803 Before publication Affected

Microsoft Windows 10 Version 1809 Before publication Affected

Microsoft Windows Server 2019 Before publication Affected

Microsoft Windows Server 2019 (Server Core installation) Before publication Affected

Microsoft Windows 10 Version 1909 Before publication Affected

Microsoft Windows Server, version 1909 (Server Core installation) Before publication Affected

Microsoft Windows 10 Version 2004 Before publication Affected

Microsoft Windows Server version 2004 Before publication Affected

Microsoft Windows 10 Version 20H2 Before publication Affected

Microsoft Windows Server version 20H2 Before publication Affected

Published: 25 Feb 2021
Exploitation Reported: 03 Nov 2021
Attack vector: Local
Complexity: Low
Privileges: Low
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2021-1732
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1732 portal.msrc.microsoft.com · CVE Record https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CV...
packetstormsecurity.com/files/161880/Win32k-ConsoleControl-Offset-Co... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/161880/Win32k-ConsoleControl-Off...
packetstormsecurity.com/files/166169/Win32k-ConsoleControl-Offset-Co... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/166169/Win32k-ConsoleControl-Off...

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 03 Nov 2021

Independent exploitation attestation added to the KEV Intelligence record.

Used in malware

CISA

Recorded 03 Nov 2021

Malware families have been linked to exploitation of this CVE.

Proof of concept available

GitHub

Recorded 05 Mar 2021

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

Learn about Pro API access

Source	Added
CISA First	2021-11-03 00:00 UTC
Tenable Blog	2026-06-02 14:20 UTC
CVE	2026-08-12 04:21 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

Metasploit template detected 28 Apr 2025.

View Metasploit template

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Metasploit	https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/cve_2022_21882_win32k.rb	28 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.8 High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

EPSS

77.8%

Weaknesses

Out-of-bounds Write CWE-787

Recent mention · Tenable Blog

Inside the customer environment: Where threat actors, vulnerabilities, and exposed assets intersect

Tenable Research has developed a graph-based model linking 600+ threat groups to real-world customer exposures. It reveals which vulnerabilities sit at the intersection of severity, active exploitation, and organizational risk.Key takeawaysThe "patch everything" strategy is...

Read full advisory

All CVSS Scores

CVSS v3.1 7.8 High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

CVSS v2.0 4.6 Medium

AV:L/AC:L/Au:N/C:P/I:P/A:P

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

exploitblizzard/Windows-Privilege-Escalation-CVE-2021-1732

github · Created 2021-04-25 12:55:15 UTC · 31 stars · AI assessment 90%

Read my blog for more info -

KaLendsi/CVE-2021-1732-Exploit

github · Created 2021-03-05 02:11:10 UTC · 417 stars · AI assessment 90%

CVE-2021-1732 Exploit

Timeline

From disclosure to observed exploitation

12 Aug 2026
KEV confirmed by CVE

Exploitation attested by an external source
02 Jun 2026
KEV confirmed by Tenable Blog

Exploitation attested by an external source
28 Apr 2025
Metasploit module available

Exploit module available
03 Nov 2021
Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
03 Nov 2021
First public exploitation report

Exploit observed in malware
05 Mar 2021
Public PoC available

Public proof-of-concept code published
25 Feb 2021
CVE published

Vulnerability disclosed publicly
02 Dec 2020
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2021-1732

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2021-1732",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.77762,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

CVE-2021-1732

What security teams need to know first

Windows Win32k Elevation of Privilege Vulnerability

Tags

CVE References

Why KEV Intelligence marks this CVE as exploited

Exploited in the wild

Used in malware

Proof of concept available

Known exploited vulnerability sources

Operational artifacts and observed signals

Observed signals

Scanner coverage

Virtual patch status

Scanner Artifacts

Severity, weaknesses, and research context

Weaknesses

Inside the customer environment: Where threat actors, vulnerabilities, and exposed assets intersect

All CVSS Scores

Potential Proof of Concepts

From disclosure to observed exploitation

KEV confirmed by CVE

KEV confirmed by Tenable Blog

Metasploit module available

Added to CISA KEV

First public exploitation report

Public PoC available

CVE published

CVE ID reserved

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