Vulnerability · Published Mar 11, 2021 · Assigned by microsoft

CVE-2021-27077Windows Win32k 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 1.4% (higher than 73% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)1.4%top 26.7% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Windows Win32k Elevation of Privilege Vulnerability

Affected products (as reported)

Vendor	Product	Versions
Microsoft	Windows 10 Version 1507	10.0.10240.0 – before 10.0.10240.18874
Microsoft	Windows 10 Version 1607	10.0.14393.0 – before 10.0.14393.4283
Microsoft	Windows 10 Version 1803	10.0.0 – before 10.0.17134.2087
Microsoft	Windows 10 Version 1809	10.0.17763.0 – before 10.0.17763.1817
Microsoft	Windows 10 Version 1809	10.0.0 – before 10.0.17763.1817
Microsoft	Windows 10 Version 1909	10.0.0 – before 10.0.18363.1440
Microsoft	Windows 10 Version 2004	10.0.0 – before 10.0.19043.867
Microsoft	Windows 10 Version 20H2	10.0.0 – before 10.0.19043.867
Microsoft	Windows 7	6.1.0 – before 6.1.7601.24566
Microsoft	Windows 7 Service Pack 1	6.1.0 – before 6.1.7601.24566
Microsoft	Windows 8.1	6.3.0 – before 6.3.9600.19968
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.7601.0 – before 6.1.7601.24566
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.1.7601.0 – before 6.1.7601.24566
Microsoft	Windows Server 2008 Service Pack 2	6.0.6003.0 – before 6.0.6003.21070
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.6003.0 – before 6.0.6003.21070
Microsoft	Windows Server 2012	6.2.9200.0 – before 6.2.9200.23298
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0 – before 6.2.9200.23298
Microsoft	Windows Server 2012 R2	6.3.9600.0 – before 6.3.9600.19968
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0 – before 6.3.9600.19968
Microsoft	Windows Server 2016	10.0.14393.0 – before 10.0.14393.4283
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0 – before 10.0.14393.4283
Microsoft	Windows Server 2019	10.0.17763.0 – before 10.0.17763.1817
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 – before 10.0.17763.1817
Microsoft	Windows Server version 2004	10.0.0 – before 10.0.19043.867
Microsoft	Windows Server version 20H2	10.0.0 – before 10.0.19043.867
Microsoft	Windows Server, version 1909 (Server Core installation)	10.0.0 – before 10.0.18363.1440

References

Windows Win32k Elevation of Privilege Vulnerability vendor-advisory, patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27077 x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-287/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-403/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-482/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-499/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-494/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-497/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-501/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-500/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-496/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-498/ x_refsource_MISC, x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-21-495/ x_refsource_MISC, x_transferred