WINDOWS PROGRAM COMPATIBILITY ASSISTANT SERVICE · CVE-2026-123388 · Infrastructure
NO FIX YET
A heap-based buffer overflow in the Windows Program Compatibility Assistant Service lets an authorized local user elevate their privileges. The sources rate it high severity (CVSS 7.8) and do not say it is exploited in the wild.
first public Nov 10, 2026 · 1 source
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Machines running Windows with the Program Compatibility Assistant Service present, where a user already has an account on the system. The sources do not list affected Windows builds or whether the service is disabled by default, so unknown.
Who cares windows
Unknown from the sources. In the analyst’s queue.
No fix yet, per the sources.
Heap-based buffer overflow in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
This page as .md · .json · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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