CVE-2019-0859

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

Microsoft · Windows · Windows Server

CVSS v3.1 NVD

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS

4.15% chance of exploitation in the next 30 days, 91st percentile

CISA KEV

added 2021-11-03, used in ransomware campaigns

Published

2019-04-09

Updated

2025-10-21

Proof-of-concept exploits (1)

• Sheisback/CVE-2019-0859-1day-Exploit117★ · 2020-02-11

Security advisories

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0859

References

• CVE Record
• NVD entry

Related

• CVE-2017-11783