## https://sploitus.com/exploit?id=CC486422-F06A-572C-980A-1AF8FB7E59A7
# CVE-2026-20805-PoC
The PoC of information disclosure in Microsoft Desktop Windows Management.
Overview
This repository contains a custom Proof of Concept (PoC) developed to reproduce CVE-2026-20805, an information disclosure vulnerability affecting the Windows Desktop Window Manager (dwm.exe) process.
The vulnerability allows a local authenticated user to leak kernel object pointers via improper handling of ALPC-related structures, potentially weakening kernel exploit mitigations such as KASLR.
This PoC was implemented independently after observing instability and execution issues in existing public scripts, with the goal of obtaining reliable and verifiable results.
Vulnerability Details
CVE ID: CVE-2026-20805
Vulnerability Type: Information Disclosure (CWE-200)
Affected Component: Desktop Window Manager (dwm.exe)
Attack Vector: Local
Impact: Kernel address disclosure (KASLR bypass primitive)
Severity: Medium
Technical Summary
The PoC leverages low-level Windows Native APIs to enumerate system-wide handles and inspect kernel object metadata.
Key Techniques Used:
NtQuerySystemInformation
SystemHandleInformation class
Process-specific handle filtering
ALPC Port and Section object analysis
Objects of Interest:
ALPC Ports (Type Index 24 / 25)
Section Objects (Type Index 36)
Improperly initialized kernel object pointers are disclosed to user mode, confirming the information leak.
Proof of Concept Results
During execution, the PoC successfully:
Identified the dwm.exe process
Enumerated hundreds of handles belonging to DWM
Disclosed valid 64-bit kernel virtual addresses
Sample Output:
Handle: 0x0004
Object: 0xFFFFD58F80C0E5E0 (Kernel Object Pointer)
Handle: 0x011C
Object: 0xFFFFD58F80C0E1E0 (ALPC Section Address)
These addresses fall within the expected kernel address range, confirming successful information disclosure.
Impact
While this vulnerability does not directly lead to privilege escalation, it provides a critical reconnaissance primitive that can be chained with other vulnerabilities.
Security Impact:
Weakens Kernel Address Space Layout Randomization (KASLR)
Increases exploit reliability
Useful in multi-stage local attack chains
Mitigation
Apply the official Microsoft security update addressing CVE-2026-20805
Restrict unnecessary access to system-wide handle enumeration
Ensure proper kernel memory initialization before exposure to user mode
Disclaimer
This project is intended strictly for educational, research, and defensive security purposes.
Do not use this code on systems you do not own or have explicit permission to test.
The author is not responsible for misuse of this PoC.
Author
Uzair Amjad
Cybersecurity Researcher