CVE-2021-40449

Microsoft Windows Win32k Privilege Escalation Vulnerability

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

Act

*SSVC

Descriptions

Win32k Elevation of Privilege Vulnerability

Una vulnerabilidad de Elevación de Privilegios en Win32k . Este ID de CVE es diferente de CVE-2021-40450, CVE-2021-41357

Unspecified vulnerability allows for an authenticated user to escalate privileges.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Act

Exploitation

Active

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2021-09-02 CVE Reserved
2021-10-13 CVE Published
2021-10-28 First Exploit
2021-11-17 Exploited in Wild
2021-12-01 KEV Due Date
2025-02-07 CVE Updated
2025-03-30 EPSS Updated

CWE

CWE-416: Use After Free

CAPEC

References (11)

URL	Tag	Source

URL	Date	SRC
https://packetstorm.news/files/id/164926	2021-11-10
https://github.com/KaLendsi/CVE-2021-40449-Exploit	2021-10-28
https://github.com/hakivvi/CVE-2021-40449	2021-11-05
https://github.com/BL0odz/CVE-2021-40449-NtGdiResetDC-UAF	2022-02-20
https://github.com/toanthang1842002/CVE-2021-40449	2023-07-17
https://github.com/ly4k/CallbackHell	2024-11-29
https://github.com/Kristal-g/CVE-2021-40449_poc	2024-10-27
https://github.com/CppXL/cve-2021-40449-poc	2022-04-13
https://github.com/SamuelTulach/voidmap	2024-12-03
http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html	2025-02-07

URL	Date	SRC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449	2024-07-24

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		Windows 10 1507 Search vendor "Microsoft" for product "Windows 10 1507"				< 10.0.10240.19086 Search vendor "Microsoft" for product "Windows 10 1507" and version " < 10.0.10240.19086"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 10 1607 Search vendor "Microsoft" for product "Windows 10 1607"				< 10.0.14393.4704 Search vendor "Microsoft" for product "Windows 10 1607" and version " < 10.0.14393.4704"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 10 1809 Search vendor "Microsoft" for product "Windows 10 1809"				< 10.0.17763.2237 Search vendor "Microsoft" for product "Windows 10 1809" and version " < 10.0.17763.2237"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 10 1909 Search vendor "Microsoft" for product "Windows 10 1909"				< 10.0.18363.1854 Search vendor "Microsoft" for product "Windows 10 1909" and version " < 10.0.18363.1854"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 10 2004 Search vendor "Microsoft" for product "Windows 10 2004"				< 10.0.19041.1288 Search vendor "Microsoft" for product "Windows 10 2004" and version " < 10.0.19041.1288"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 10 20h2 Search vendor "Microsoft" for product "Windows 10 20h2"				< 10.0.19041.1288 Search vendor "Microsoft" for product "Windows 10 20h2" and version " < 10.0.19041.1288"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 10 21h1 Search vendor "Microsoft" for product "Windows 10 21h1"				< 10.0.19041.1288 Search vendor "Microsoft" for product "Windows 10 21h1" and version " < 10.0.19041.1288"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 11 Search vendor "Microsoft" for product "Windows 11"				*		-		Affected
Microsoft Search vendor "Microsoft"		Windows 11 21h2 Search vendor "Microsoft" for product "Windows 11 21h2"				< 10.0.22000.258 Search vendor "Microsoft" for product "Windows 11 21h2" and version " < 10.0.22000.258"		-		Affected
Microsoft Search vendor "Microsoft"		Windows 7 Search vendor "Microsoft" for product "Windows 7"				-		sp1		Affected
Microsoft Search vendor "Microsoft"		Windows 8.1 Search vendor "Microsoft" for product "Windows 8.1"				-		-		Affected
Microsoft Search vendor "Microsoft"		Windows Rt 8.1 Search vendor "Microsoft" for product "Windows Rt 8.1"				-		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2004 Search vendor "Microsoft" for product "Windows Server 2004"				< 10.0.19041.1288 Search vendor "Microsoft" for product "Windows Server 2004" and version " < 10.0.19041.1288"		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2008 Search vendor "Microsoft" for product "Windows Server 2008"				-		sp2		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2008 Search vendor "Microsoft" for product "Windows Server 2008"				r2 Search vendor "Microsoft" for product "Windows Server 2008" and version "r2"		sp1, x64		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2012 Search vendor "Microsoft" for product "Windows Server 2012"				-		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2012 Search vendor "Microsoft" for product "Windows Server 2012"				r2 Search vendor "Microsoft" for product "Windows Server 2012" and version "r2"		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2016 Search vendor "Microsoft" for product "Windows Server 2016"				< 10.0.14393.4704 Search vendor "Microsoft" for product "Windows Server 2016" and version " < 10.0.14393.4704"		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2019 Search vendor "Microsoft" for product "Windows Server 2019"				< 10.0.17763.2237 Search vendor "Microsoft" for product "Windows Server 2019" and version " < 10.0.17763.2237"		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2022 Search vendor "Microsoft" for product "Windows Server 2022"				< 10.0.20348.288 Search vendor "Microsoft" for product "Windows Server 2022" and version " < 10.0.20348.288"		-		Affected
Microsoft Search vendor "Microsoft"		Windows Server 20h2 Search vendor "Microsoft" for product "Windows Server 20h2"				< 10.0.19042.1288 Search vendor "Microsoft" for product "Windows Server 20h2" and version " < 10.0.19042.1288"		-		Affected