TI-2021-19245 Aliases CVE-2021-43237 GHSA-f87g-rqhg-rq8r

Windows Setup Elevation of Privilege Vulnerability

LOW 38CWE-59Published 2021-12-15 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Windows Setup Elevation of Privilege Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01073 65th percentileScored 2026-11-07

Fix Fixed Windows 10 Version 1909 (Microsoft): 10.0.18363.1977Windows 10 Version 21H1 (Microsoft): 10.0.19043.1415+7 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	Windows 10 Version 1909	10.0.0 to before 10.0.18363.1977	10.0.18363.1977	Patch available	CNA
Microsoft	Windows 10 Version 21H1	10.0.0 to before 10.0.19043.1415	10.0.19043.1415	Patch available	CNA
Microsoft	Windows Server 2022	10.0.0 to before 10.0.20348.405	10.0.20348.405	Patch available	CNA
Microsoft	Windows 10 Version 2004	10.0.0 to before 10.0.19041.1415	10.0.19041.1415	Patch available	CNA
Microsoft	Windows Server version 2004	10.0.0 to before 10.0.19041.1415	10.0.19041.1415	Patch available	CNA
Microsoft	Windows 10 Version 20H2	10.0.0 to before 10.0.19042.1415	10.0.19042.1415	Patch available	CNA
Microsoft	Windows Server version 20H2	10.0.0 to before 10.0.19042.1415	10.0.19042.1415	Patch available	CNA
Microsoft	Windows 11 version 21H2	10.0.0 to before 10.0.22000.376	10.0.22000.376	Patch available	CNA
Microsoft	Windows 10 Version 21H2	10.0.0 to before 10.0.19044.1415	10.0.19044.1415	Patch available	CNA

Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1977 Fixed in 10.0.18363.1977 Patch available CNA
Windows 10 Version 21H1 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.1415 Fixed in 10.0.19043.1415 Patch available CNA
Windows Server 2022 VendorMicrosoft Affected 10.0.0 to before 10.0.20348.405 Fixed in 10.0.20348.405 Patch available CNA
Windows 10 Version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1415 Fixed in 10.0.19041.1415 Patch available CNA
Windows Server version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1415 Fixed in 10.0.19041.1415 Patch available CNA
Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1415 Fixed in 10.0.19042.1415 Patch available CNA
Windows Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1415 Fixed in 10.0.19042.1415 Patch available CNA
Windows 11 version 21H2 VendorMicrosoft Affected 10.0.0 to before 10.0.22000.376 Fixed in 10.0.22000.376 Patch available CNA
Windows 10 Version 21H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19044.1415 Fixed in 10.0.19044.1415 Patch available CNA

CPE configurations NVD · 20

CPE	Versions	Role	Vendor
cpe:2.3:o:microsoft:windows_10:20h2::::::arm64:	20h2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:20h2::::::x64:	20h2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:20h2::::::x86:	20h2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:21h1::::::arm64:	21h1	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:21h1::::::x64:	21h1	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:21h1::::::x86:	21h1	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:21h2::::::arm64:	21h2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:21h2::::::x64:	21h2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:21h2::::::x86:	21h2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:1909::::::arm64:	1909	Vulnerable	Microsoft

cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:arm64:* Versions 20h2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x64:* Versions 20h2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x86:* Versions 20h2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:arm64:* Versions 21h1 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x64:* Versions 21h1 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x86:* Versions 21h1 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:arm64:* Versions 21h2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x64:* Versions 21h2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x86:* Versions 21h2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:arm64:* Versions 1909 Vulnerable ·Microsoft

Show 10 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:o:microsoft:windows_10:1909::::::x64:	1909	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:1909::::::x86:	1909	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:2004::::::arm64:	2004	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:2004::::::x64:	2004	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:2004::::::x86:	2004	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_11:-::::::arm64:	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_11:-::::::x64:	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server:20h2:::::::*	20h2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server:2022:::::::*	2022	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server_2016:2004:::::::*	2004	Vulnerable	Microsoft

cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x64:* Versions 1909 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x86:* Versions 1909 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:arm64:* Versions 2004 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x64:* Versions 2004 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x86:* Versions 2004 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:arm64:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_11:-:*:*:*:*:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server:20h2:*:*:*:*:*:*:* Versions 20h2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server:2022:*:*:*:*:*:*:* Versions 2022 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft

Remediation

Fix · CNA Windows 10 Version 1909 (Microsoft) Fixed in 10.0.18363.1977
Fix · CNA Windows 10 Version 21H1 (Microsoft) Fixed in 10.0.19043.1415
Fix · CNA Windows Server 2022 (Microsoft) Fixed in 10.0.20348.405
Fix · CNA Windows 10 Version 2004 (Microsoft) Fixed in 10.0.19041.1415
Fix · CNA Windows Server version 2004 (Microsoft) Fixed in 10.0.19041.1415
Fix · CNA Windows 10 Version 20H2 (Microsoft) Fixed in 10.0.19042.1415
Fix · CNA Windows Server version 20H2 (Microsoft) Fixed in 10.0.19042.1415
Fix · CNA Windows 11 version 21H2 (Microsoft) Fixed in 10.0.22000.376
Fix · CNA Windows 10 Version 21H2 (Microsoft) Fixed in 10.0.19044.1415

Timeline

2026-10-02 Threatist record created from CVE-2021-43237
2026-10-03 Alias added: GHSA-f87g-rqhg-rq8r

References

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43237

Advisory 1

https://www.zerodayinitiative.com/advisories/ZDI-22-018/

TI-2015-02132 Buffer underflow in atmfd.dll in the Windows Adobe Type Manager Library in Microsoft… KEVCVSS 3.1HIGH 8.8
TI-2022-10056 Remote Procedure Call Runtime Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
TI-2022-06273 HTTP Protocol Stack Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
TI-2019-00906 Remote Desktop Services Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
TI-2022-15533 Windows Internet Key Exchange (IKE) Protocol Extensions Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
TI-2015-01587 Mount Manager in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows… KEVCVSS 3.1MEDIUM 6.6

See all 2973 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences

Windows Setup Elevation of Privilege Vulnerability

Key facts

Summary

Why it matters now

SSVC decision points

Affected products

CPE configurations NVD · 20

Remediation

Timeline

References

Patch 1

Advisory 1

More Microsoft Windows 10 vulnerabilities

Sources