CVE-2023-21805

highpriority · track · 0EPSS 0.007 · 54 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.74% (54th) EPSS

CVSS 7.8 · high

Is it mine?

130 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · msrc_csaf

EPSS · scored 2026-10-28

Windows MSHTML Platform Remote Code Execution Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows 10 Version 1607 for 32-bit Systemsmsrc_csaf
10.0.14393.5717:Security Update:https://support.microsoft.com/help/5022838
https://support.microsoft.com/help/5022838
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.5717:Security Update:https://support.microsoft.com/help/5022838
https://support.microsoft.com/help/5022838
FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.4010:Security Update:https://support.microsoft.com/help/5022840
https://support.microsoft.com/help/5022840
FixedWindows 10 Version 1809 for ARM64-based Systemsmsrc_csaf
10.0.17763.4010:Security Update:https://support.microsoft.com/help/5022840
https://support.microsoft.com/help/5022840
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.4010:Security Update:https://support.microsoft.com/help/5022840
https://support.microsoft.com/help/5022840
FixedWindows 10 Version 20H2 for 32-bit Systemsmsrc_csaf
10.0.19042.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 Version 20H2 for ARM64-based Systemsmsrc_csaf
10.0.19042.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 Version 21H2 for 32-bit Systemsmsrc_csaf
10.0.19044.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 Version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.19044.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 Version 21H2 for x64-based Systemsmsrc_csaf
10.0.19044.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 Version 22H2 for 32-bit Systemsmsrc_csaf
10.0.19045.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.19045.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.19045.2604:Security Update:https://support.microsoft.com/help/5022834
https://support.microsoft.com/help/5022834
FixedWindows 10 for 32-bit Systemsmsrc_csaf
10.0.10240.19747:Security Update:https://support.microsoft.com/help/5022858
https://support.microsoft.com/help/5022858
FixedWindows 10 for x64-based Systemsmsrc_csaf
10.0.10240.19747:Security Update:https://support.microsoft.com/help/5022858
https://support.microsoft.com/help/5022858
FixedWindows 11 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.1265:Security Update:https://support.microsoft.com/help/5022845
https://support.microsoft.com/help/5022845
FixedWindows 11 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.22621.1265:Security Update:https://support.microsoft.com/help/5022845
https://support.microsoft.com/help/5022845
FixedWindows 11 version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.1574:Security Update:https://support.microsoft.com/help/5022836
https://support.microsoft.com/help/5022836
FixedWindows 11 version 21H2 for x64-based Systemsmsrc_csaf
10.0.22621.1574:Security Update:https://support.microsoft.com/help/5022836
https://support.microsoft.com/help/5022836
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2008 for 32-bit Systems Service Pack 2msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2008 for x64-based Systems Service Pack 2msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2012msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2012 (Server Core installation)msrc_csaf
1.1.0.0:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2012 R2msrc_csaf
6.3.9600.20818:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2012 R2 (Server Core installation)msrc_csaf
6.3.9600.20818:IE Cumulative:https://support.microsoft.com/help/5022835
https://support.microsoft.com/help/5022835
FixedWindows Server 2016msrc_csaf
10.0.14393.5717:Security Update:https://support.microsoft.com/help/5022838
https://support.microsoft.com/help/5022838
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.5717:Security Update:https://support.microsoft.com/help/5022838
https://support.microsoft.com/help/5022838
FixedWindows Server 2019msrc_csaf
10.0.17763.4010:Security Update:https://support.microsoft.com/help/5022840
https://support.microsoft.com/help/5022840
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.4010:Security Update:https://support.microsoft.com/help/5022840
https://support.microsoft.com/help/5022840
FixedWindows Server 2022msrc_csaf
10.0.20348.1547:Security Update:https://support.microsoft.com/help/5022842
https://support.microsoft.com/help/5022842
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.1547:Security Update:https://support.microsoft.com/help/5022842
https://support.microsoft.com/help/5022842

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

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

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

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

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-77USCWE-77USCWE-94US

affected products (130)

Products and version ranges known to be affected.

Microsoft Windows 10 Version 150710.0.10240.0 → 10.0.10240.19747enisa_euvdEU
Microsoft Windows 10 Version 160710.0.14393.0 → 10.0.14393.5717enisa_euvdEU
Microsoft Windows 10 Version 180910.0.0 → 10.0.17763.4010enisa_euvdEU
Microsoft Windows 10 Version 180910.0.17763.0 → 10.0.17763.4010enisa_euvdEU
Microsoft Windows 10 Version 20H210.0.0 → 10.0.19042.2604enisa_euvdEU
Microsoft Windows 10 Version 21H210.0.19043.0 → 10.0.19044.2604enisa_euvdEU
Microsoft Windows 10 Version 22H210.0.19045.0 → 10.0.19045.2604enisa_euvdEU
Microsoft Windows 11 version 21H210.0.0 → 10.0.22621.1574enisa_euvdEU
Microsoft Windows 11 version 22H210.0.22621.0 → 10.0.22621.1265enisa_euvdEU
Microsoft Windows Server 2008 R2 Service Pack 16.1.7601.0 → 6.1.7601.26366enisa_euvdEU
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 → 6.1.7601.26366enisa_euvdEU
Microsoft Windows Server 2008 Service Pack 26.0.6003.0 → 6.0.6003.21915enisa_euvdEU
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 → 6.0.6003.21915enisa_euvdEU
Microsoft Windows Server 20126.2.9200.0 → 6.2.9200.24116enisa_euvdEU
Microsoft Windows Server 2012 (Server Core installation)6.2.9200.0 → 6.2.9200.24116enisa_euvdEU
Microsoft Windows Server 2012 R26.3.9600.0 → 6.3.9600.20821enisa_euvdEU
Microsoft Windows Server 2012 R2 (Server Core installation)6.3.9600.0 → 6.3.9600.20821enisa_euvdEU
Microsoft Windows Server 201610.0.14393.0 → 10.0.14393.5717enisa_euvdEU
Microsoft Windows Server 2016 (Server Core installation)10.0.14393.0 → 10.0.14393.5717enisa_euvdEU
Microsoft Windows Server 201910.0.17763.0 → 10.0.17763.4010enisa_euvdEU

showing 20 of 130

advisories (1)

Vendor and ecosystem advisories describing this.

msrc_CVE-2023-21805Windows MSHTML Platform Remote Code Execution Vulnerability2023-02-14csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu msrc_csaf NVD CVE.org MITRE

published 2023-02-14modified 2026-08-19

references (5)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan