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CVE-2019-1132 is a local elevation of privilege vulnerability in Microsoft Windows caused by improper handling of objects in memory within the Win32k subsystem. Available reporting identifies the flaw as a NULL pointer dereference in win32k.sys, specifically associated with win32k!xxxMNOpenHierarchy and popup menu object handling. Successful exploitation allows an attacker running code on the target system to leverage the kernel-mode flaw to elevate privileges from a lower-privileged context to SYSTEM. The vulnerability was observed in the wild and used as a zero-day by the Buhtrap threat group.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository is a proof-of-concept (POC) exploit for CVE-2019-1132, a local privilege escalation vulnerability affecting Microsoft Windows 7 x86 build 7601 (with the June Patch installed). The repository contains four files: a README.md describing the exploit and its tested environment, a Visual Studio solution file (cve-2019-1132.sln), a project file (cve-2019-1132.vcxproj), and the main exploit code (main.cpp). The exploit leverages a vulnerability in the Windows kernel (win32k.sys) to escalate privileges. The main.cpp file contains the full exploit logic, including kernel structure manipulation and the use of a NULL page mapping technique. Upon successful exploitation, the code spawns a new command shell (cmd.exe) with elevated privileges, demonstrating the exploit's effectiveness. The exploit is not weaponized for mass exploitation but serves as a technical demonstration of the vulnerability. No network or remote endpoints are involved; the attack vector is strictly local.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows kernel local privilege escalation zero-day involving a NULL pointer dereference in win32k!xxxMNOpenHierarchy/tagPOPUPMENU; attribution to this exploit seller is noted as probable but not fully confirmed by sample recovery.
A Windows elevation-of-privilege vulnerability used here as a real-world exploit example to test detection of HMValidateHandle-based win32k exploitation techniques.
A Microsoft Windows local privilege escalation vulnerability in win32k.sys caused by a NULL pointer dereference, used by the Buhtrap group as a zero-day to gain highest privileges for malware installation.
An elevation of privilege vulnerability in Win32k.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.