CVE-2019-0859

HIGH KEV RANSOMWARE

Windows - Elevation of Privilege in Win32k Component

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2019-0859 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 3, 2021, with confirmed use in ransomware campaigns. EIP tracks 1 public exploit from researchers including Sheisback.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2019-0859, targeting Windows 7 x64 SP1. The exploit leverages a use-after-free vulnerability in the Windows win32k.sys driver, specifically in the handling of bitmap objects, to achieve local privilege escalation.

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.

Exploits (1)

nomisec WORKING POC 120 stars
by Sheisback · local
https://github.com/Sheisback/CVE-2019-0859-1day-Exploit

This repository contains a functional exploit for CVE-2019-0859, targeting Windows 7 x64 SP1. The exploit leverages a use-after-free vulnerability in the Windows win32k.sys driver, specifically in the handling of bitmap objects, to achieve local privilege escalation.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Racy
Target: Windows 7 x64 Service Pack 1 (7601)
No auth needed
Prerequisites: Target system must be running Windows 7 x64 SP1 with March 2019 security updates applied
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 7.8
EPSS 0.0415
EPSS Percentile 89.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable no
Technical Impact total

Details

CISA KEV 2021-11-03
VulnCheck KEV 2019-03-17
InTheWild.io 2019-03-17
ENISA EUVD EUVD-2019-1610
Ransomware Use Confirmed
Status published
Products (17)
microsoft/windows_10_1507 (2 CPE variants)
microsoft/windows_10_1607 (2 CPE variants)
microsoft/windows_10_1703 (2 CPE variants)
microsoft/windows_10_1709 (3 CPE variants)
microsoft/windows_10_1803 (3 CPE variants)
microsoft/windows_10_1809 (3 CPE variants)
microsoft/windows_7
microsoft/windows_8.1
microsoft/windows_rt_8.1
microsoft/windows_server_1709
... and 7 more
Published Apr 09, 2019
KEV Added Nov 03, 2021
Tracked Since Feb 18, 2026