Actively exploited · Published Apr 9, 2019 · Assigned by microsoft
CVE-2019-0859
High 7.8 Exploited Ransomware
In plain English
A high-severity security flaw in Windows from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 4.2% (higher than 91% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by May 3, 2022.
Official description
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0685, CVE-2019-0803.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows | 7 for 32-bit Systems Service Pack 17 for x64-based Systems Service Pack 18.1 for 32-bit systems8.1 for x64-based systemsRT 8.110 for 32-bit Systems10 for x64-based Systems10 Version 1607 for 32-bit Systems |
| Microsoft | Windows Server | 2008 R2 for x64-based Systems Service Pack 1 (Core installation)2008 R2 for Itanium-Based Systems Service Pack 12008 R2 for x64-based Systems Service Pack 12008 for 32-bit Systems Service Pack 2 (Core installation)20122012 (Core installation)2012 R22012 R2 (Core installation) |