CVE-2020-1054: Microsoft Win32k Privilege Escalation Vulnerability
CVE-2020-1054 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2021-11-03
An elevation of privilege vulnerability exists in the Windows kernel-mode driver (Win32k) due to improper handling of objects in memory. Successful exploitation allows a local attacker to execute arbitrary code in kernel mode via an out-of-bounds write.
Yes. CVE-2020-1054 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-1054?
Critical severity, with a CVSS score of 7.8, published 3 November 2021.
Which products and versions are affected?
Microsoft Windows 7 Service Pack 1; Microsoft Windows 8.1; Microsoft Windows RT 8.1; Microsoft Windows 10 1507, 1607, 1709, 1803, 1809, 1903, 1909; and 4 more.
Is there a fix for CVE-2020-1054?
A patch was published on 2020-05-12: MSRC advisory and patch released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2020-1054 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2020-1054?
Check whether you run Microsoft Win32K. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Microsoft Windows 7 Service Pack 1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows 10 1507, 1607, 1709, 1803, 1809, 1903, 1909
Microsoft Windows Server 2008 Service Pack 2, R2 Service Pack 1
Microsoft Windows Server 2012 Gold, R2
Microsoft Windows Server 2016 Gold, 1803, 1903, 1909
Microsoft Windows Server 2019
Timeline
2020-05-12: patched: MSRC advisory and patch released
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog