CVE-2021-41357

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.016 · 75 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

1.58% (75th) EPSS

CVSS 4.6 · medium

Is it mine?

22 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2022-04-25remediate by 2022-05-16

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-26

Microsoft Win32k Privilege Escalation Vulnerability

Win32k Elevation of Privilege Vulnerability

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–7.8

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 6.4

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:P/E:Hsecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:Csecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1.8 · impact 5.9

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264US

affected products (22)

Products and version ranges known to be affected.

Microsoft Windows 10 Version 200410.0.0 → 10.0.19041.1288enisa_euvdEU
Microsoft Windows 10 Version 20H210.0.0 → 10.0.19042.1288enisa_euvdEU
Microsoft Windows 10 Version 21H110.0.0 → 10.0.19043.1288enisa_euvdEU
Microsoft Windows 11 version 21H210.0.0 → 10.0.22000.258enisa_euvdEU
Microsoft Windows Server 202210.0.0 → 10.0.20348.288enisa_euvdEU
Microsoft Windows Server version 200410.0.0 → 10.0.19041.1288enisa_euvdEU
Microsoft Windows Server version 20H210.0.0 → 10.0.19042.1288enisa_euvdEU
Microsoft Corp Windows 10 2004all versionsfstec_bduRU
Microsoft Corp Windows 10 20H2all versionsfstec_bduRU
Microsoft Corp Windows 10 21H1all versionsfstec_bduRU
Microsoft Corp Windows 11all versionsfstec_bduRU
Microsoft Corp Windows Server 2004 (Server Core Installation)all versionsfstec_bduRU
Microsoft Corp Windows Server 2022all versionsfstec_bduRU
Microsoft Corp Windows Server 2022 (Server Core installation)all versionsfstec_bduRU
Microsoft Corp Windows Server 20H2 (Server Core Installation)all versionsfstec_bduRU
microsoft windows 10 2004< 10.0.19041.1288nvdUScpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*
microsoft windows 10 20h2< 10.0.19042.1288nvdUScpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*
microsoft windows 10 21h1< 10.0.19043.1288nvdUScpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*
microsoft windows 11 21h2< 10.0.22000.258nvdUScpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
microsoft windows server 2004< 10.0.19041.1288nvdUScpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*

showing 20 of 22

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-10-13modified 2026-06-17

references (8)

External citations — patches, advisories, analysis.

scry

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