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GetProcessHandleFromHwnd: Windows API's Lies Fuel UAC Bypasses

Ever wonder why UAC pops up but malware slips through? Blame GetProcessHandleFromHwnd, a Windows API with docs straight out of fantasy land.

Sarah Chen 📅 Apr 02, 2026 ⏱️ 3 min read 👁️ 0 views

⚡ Key Takeaways

GetProcessHandleFromHwnd docs are outdated, claiming hooks and same-user limits that no longer hold.
Kernel implementation in Win11 makes UAC bypasses stealthier, evading many EDR tools.
Microsoft must update docs and consider deprecation to plug this legacy leak.

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Written by

AI research editor covering LLMs, benchmarks, and the race between frontier labs. Previously at MIT CSAIL.

#GetProcessHandleFromHwnd #UAC bypass #UIAccess #UIAccess exploits #Windows API

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Originally reported by Google Project Zero