Actively exploited · Published Apr 13, 2021 · Assigned by microsoft
CVE-2021-28310Win32k Elevation of Privilege Vulnerability
High 7.8 Exploited
In plain English
A high-severity out-of-bounds write in Windows 10 Version 1803 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 8.4% (higher than 95% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)8.4%top 5.0% of all CVEs
Exploited in the wildYesCISA KEV since Nov 3, 2021
Attack tooling1Public PoC
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Nov 17, 2021.
Official description
Win32k Elevation of Privilege Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1803 | 10.0.0 – before publication |
| Microsoft | Windows 10 Version 1809 | 10.0.0 – before publication |
| Microsoft | Windows Server 2019 | 10.0.0 – before publication |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 – before publication |
| Microsoft | Windows 10 Version 1909 | 10.0.0 – before publication |
| Microsoft | Windows Server, version 1909 (Server Core installation) | 10.0.0 – before publication |
| Microsoft | Windows 10 Version 2004 | 10.0.0 – before publication |
| Microsoft | Windows Server version 2004 | 10.0.0 – before publication |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 – before publication |
| Microsoft | Windows Server version 20H2 | 10.0.0 – before publication |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C