CVE-2026-83563 · Infrastructure
NO FIX YET
A heap-based buffer overflow in Windows Winlogon, the logon component, lets an authorized local user elevate their privileges. The sources do not give affected versions, fixed builds, or a patch reference.
first public Nov 10, 2026 · 1 source
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Only users who already have a local account on the Windows machine can use this flaw to gain higher privileges. The sources do not name affected Windows builds, so check the vendor's security update notes for this CVE. unknown
Not affected if no-local-accounts
Who cares windows, winlogon
Unknown from the sources. In the analyst’s queue.
No fix yet, per the sources.
Heap-based buffer overflow in Winlogon 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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