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New Microsoft Defender update can let hackers totally fill your Windows 11 PC disk space
neowin.net/news/new-microsoft-defender-update-can-let-hackers-totally-fill-your-windows-11-pc-disk-space/
New Microsoft Defender update can let hackers totally fill your Windows 11 ...
Key FactsMicrosoft Defender Patch Triggers Extreme Disk Usage
Jul 14, 2026 · Reading time: ~30 sec.
Summary created with AI assistance · Source: neowin.net
  • A recent update to Microsoft Defender's Malware Protection Engine fixes a privilege escalation flaw but can cause full disk exhaustion.

  • The issue arises because cached Zone.Identifier alternate data streams lack enforced size limits, enabling excessive disk consumption.

  • Attackers exploit a malicious SMB server to deliver oversized files that Defender caches indefinitely, leading to disk space depletion.

  • This vulnerability is confirmed on Windows 11 25H2 and Windows Server 2025, with ongoing research into potential WebDAV exploitation.
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neowin.net/news/microsoft-updates-security-baseline-package-for-windows-server-2025/
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winfuture.de/news,156533.html
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Windows 11 24H2 and 25H2 get big new updates with new feautres and fixes in KB5074105 - Neowin
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SharePoint attack wave: Microsoft reveals access data theft: A wave of attacks using manipulated SharePoint links is allowing hackers worldwide to hijack ...
winfuture.de/news,156381.html
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