CVE-2021-40449 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
microsoft	CNA	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

Base Score

CVSS 3.x

EPSS Score

Percentile: 99%

Affected Products (NVD)

Vendor	Product	Version
microsoft	windows_10_1507	𝑥 < 10.0.10240.19086
microsoft	windows_10_1607	𝑥 < 10.0.14393.4704
microsoft	windows_10_1809	𝑥 < 10.0.17763.2237
microsoft	windows_10_1909	𝑥 < 10.0.18363.1854
microsoft	windows_10_2004	𝑥 < 10.0.19041.1288
microsoft	windows_10_20h2	𝑥 < 10.0.19041.1288
microsoft	windows_10_21h1	𝑥 < 10.0.19041.1288
microsoft	windows_11	*
microsoft	windows_11_21h2	𝑥 < 10.0.22000.258
microsoft	windows_7	-
microsoft	windows_8.1	-
microsoft	windows_rt_8.1	-
microsoft	windows_server_2004	𝑥 < 10.0.19041.1288
microsoft	windows_server_2008	-
microsoft	windows_server_2012	-
microsoft	windows_server_2016	𝑥 < 10.0.14393.4704
microsoft	windows_server_2019	𝑥 < 10.0.17763.2237
microsoft	windows_server_2022	𝑥 < 10.0.20348.288
microsoft	windows_server_20h2	𝑥 < 10.0.19042.1288

𝑥

= Vulnerable software versions

Windows Releases

Platform

Version

Windows 10

(x64, x86)	KB5006675
1607 (x64, x86)	KB5006669
1809 (arm64, x64, x86)	KB5006672
1909 (arm64, x64, x86)	KB5006667
2004 (arm64, x64, x86)	KB5006670
20H2 (arm64, x86)	KB5006670
21H1 (arm64, x64, x86)	KB5006670

Windows 11

21H2 (arm64, x64)

KB5006674

Windows 7

Service Pack 1 (x64, x86)

KB5006743

Windows 8.1

(x64, x86)	KB5006714
(x64, x86)	KB5006729

Windows RT 8.1

All

KB5006714

Windows Server

2004 Server Core	KB5006670
20H2 Server Core	KB5006670

Windows Server 2008

Service Pack 2 (x64, x86)	KB5006736
Service Pack 2 Server Core (x64, x86)	KB5006736

Windows Server 2008 R2

Service Pack 1 (x64)	KB5006743
Service Pack 1 Server Core (x64)	KB5006743

Windows Server 2012

Server Core	KB5006739
Standard	KB5006739

Windows Server 2012 R2

Server Core	KB5006714
Server Core	KB5006729
Standard	KB5006714
Standard	KB5006729

Windows Server 2016

Server Core	KB5006669
Standard	KB5006669

Windows Server 2019

Server Core	KB5006672
Standard	KB5006672

Windows Server 2022

Server Core	KB5006699
Standard	KB5006699

Known Exploits!

Common Weakness Enumeration

CWE-416 - Use After Free
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

References

http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449

http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40449