Microsoft released a security update to address a zero-day vulnerability in Desktop Window Manager, tracked as CVE-2026-20805, after detecting active exploitation. The flaw allows local attackers to expose sensitive user-mode memory and potentially escalate privileges. Affected platforms include Windows 10 version 1809, Windows Server 2012, 2012 R2, and 2016. Microsoft urges immediate patch deployment, restriction of low-privilege accounts, and monitoring of DWM processes to mitigate risk. No public proof-of-concept code exists, but organizations running unsupported systems face increased exposure.
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