// For flags

CVE-2021-34516

Win32k Elevation of Privilege Vulnerability

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Win32k Elevation of Privilege Vulnerability

Una vulnerabilidad de Elevación de Privilegios en Win32k . Este ID de CVE es diferente de CVE-2021-34449

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the cdd.dll driver. The issue results from dereferencing a NULL pointer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

*Credits: Marcin Wiazowski
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
High
Privileges Required
Low
User Interaction
None
Scope
Changed
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:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-06-09 CVE Reserved
  • 2021-07-14 CVE Published
  • 2024-06-19 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
References (21)
URL Tag Source
https://www.zerodayinitiative.com/advisories/ZDI-21-1004 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1005 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1006 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1007 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1008 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1009 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1010 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1011 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1012 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1013 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1014 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1015 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1016 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1017 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1018 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1019 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1020 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1021 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1022 Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-895 Third Party Advisory
URL Date SRC
URL Date SRC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34516 2023-12-28
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
Search vendor "Microsoft" for product "Windows 10"
--
Affected
Microsoft
Search vendor "Microsoft"
 Windows 10
Search vendor "Microsoft" for product "Windows 10"
 20h2
Search vendor "Microsoft" for product "Windows 10" and version "20h2"
-
Affected
Microsoft
Search vendor "Microsoft"
 Windows 10
Search vendor "Microsoft" for product "Windows 10"
 21h1
Search vendor "Microsoft" for product "Windows 10" and version "21h1"
-
Affected
Microsoft
Search vendor "Microsoft"
 Windows 10
Search vendor "Microsoft" for product "Windows 10"
 1607
Search vendor "Microsoft" for product "Windows 10" and version "1607"
-
Affected
Microsoft
Search vendor "Microsoft"
 Windows 10
Search vendor "Microsoft" for product "Windows 10"
 1809
Search vendor "Microsoft" for product "Windows 10" and version "1809"
-
Affected
Microsoft
Search vendor "Microsoft"
 Windows 10
Search vendor "Microsoft" for product "Windows 10"
 1909
Search vendor "Microsoft" for product "Windows 10" and version "1909"
-
Affected
Microsoft
Search vendor "Microsoft"
 Windows 10
Search vendor "Microsoft" for product "Windows 10"
 2004
Search vendor "Microsoft" for product "Windows 10" and version "2004"
-
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 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"
--
Affected
Microsoft
Search vendor "Microsoft"
 Windows Server 2016
Search vendor "Microsoft" for product "Windows Server 2016"
 20h2
Search vendor "Microsoft" for product "Windows Server 2016" and version "20h2"
-
Affected
Microsoft
Search vendor "Microsoft"
 Windows Server 2016
Search vendor "Microsoft" for product "Windows Server 2016"
 2004
Search vendor "Microsoft" for product "Windows Server 2016" and version "2004"
-
Affected
Microsoft
Search vendor "Microsoft"
 Windows Server 2019
Search vendor "Microsoft" for product "Windows Server 2019"
--
Affected