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CVE-2019-0859 is a local elevation-of-privilege vulnerability in Microsoft Windows affecting Windows 7 through Windows 10 and Windows Server 2008 through Windows Server 2019. The flaw resides in the Win32k component, which fails to properly handle objects in memory. By running a specially crafted application on a vulnerable system, an authenticated local attacker can trigger the flaw and execute arbitrary code in kernel mode. Microsoft describes the issue as 'Win32k Elevation of Privilege Vulnerability.' The provided content also indicates the vulnerability was observed exploited in the wild as a zero-day by APT actors.
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What an attacker gets, and what they’ve been doing with it.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a proof-of-concept (POC) exploit for CVE-2019-0859, a local privilege escalation vulnerability in Microsoft Windows 7 x64 Service Pack 1 (build 7601) with the 2019 March security update. The exploit is implemented in C++ with a custom x64 assembly routine (syscall_x64.asm) to perform direct system calls, bypassing standard Windows APIs. The codebase includes header files defining Windows kernel structures and a project file for building with Visual Studio. The README provides usage notes and target requirements. The exploit is not 100% reliable and may require multiple attempts. No network or remote attack vectors are present; exploitation requires local code execution on the target system.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows Win32k local privilege escalation vulnerability that can allow an authenticated attacker to execute arbitrary code in kernel mode and gain elevated privileges.
Windows privilege escalation vulnerability usable by ProLock ransomware.
Windows privilege escalation vulnerability usable by ProLock ransomware operators.
Windows privilege escalation vulnerability referenced as usable by ProLock ransomware to elevate privileges.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.