Vulnerability · Published Jul 14, 2021 · Assigned by microsoft

CVE-2021-34516Win32k Elevation of Privilege Vulnerability

High 7.8

In plain English

A high-severity security flaw in Windows 10 Version 1507 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)1.3%top 29.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Win32k Elevation of Privilege Vulnerability

Affected products (as reported)

Vendor	Product	Versions
Microsoft	Windows 10 Version 1507	10.0.10240.0 – before 10.0.10240.19003
Microsoft	Windows 10 Version 1607	10.0.14393.0 – before 10.0.14393.4530
Microsoft	Windows 10 Version 1809	10.0.17763.0 – before 10.0.17763.2061
Microsoft	Windows 10 Version 1809	10.0.0 – before 10.0.17763.2061
Microsoft	Windows 10 Version 1909	10.0.0 – before 10.0.18363.1679
Microsoft	Windows 10 Version 2004	10.0.0 – before 10.0.19041.1110
Microsoft	Windows 10 Version 20H2	10.0.0 – before 10.0.19042.1110
Microsoft	Windows 10 Version 21H1	10.0.0 – before 10.0.19043.1110
Microsoft	Windows 7	6.1.0 – before 6.1.7601.25661
Microsoft	Windows 7 Service Pack 1	6.1.0 – before 6.1.7601.25661
Microsoft	Windows 8.1	6.3.0 – before 6.3.9600.20069
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.7601.0 – before 6.1.7601.25661
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.1.7601.0 – before 6.1.7601.25661
Microsoft	Windows Server 2008 Service Pack 2	6.0.6003.0 – before 6.0.6003.21167
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.6003.0 – before 6.0.6003.21167
Microsoft	Windows Server 2012	6.2.9200.0 – before 6.2.9200.23409
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0 – before 6.2.9200.23409
Microsoft	Windows Server 2012 R2	6.3.9600.0 – before 6.3.9600.20069
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0 – before 6.3.9600.20069
Microsoft	Windows Server 2016	10.0.14393.0 – before 10.0.14393.4530
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0 – before 10.0.14393.4530
Microsoft	Windows Server 2019	10.0.17763.0 – before 10.0.17763.2061
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 – before 10.0.17763.2061
Microsoft	Windows Server version 2004	10.0.0 – before 10.0.19041.1110
Microsoft	Windows Server version 20H2	10.0.0 – before 10.0.19042.1110

References

Win32k Elevation of Privilege Vulnerability vendor-advisory, patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34516 x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-895/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1019/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1005/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1017/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1006/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1008/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1007/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1021/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1009/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1018/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1004/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1020/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1016/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1022/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1015/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1011/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1010/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1013/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1014/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-1012/ x_refsource_MISC, x_transferred