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New Windows Defender ShieldCrash 0-Day Bypasses Microsoft Patch to Read Files as SYSTEM
Researcher's ShieldCrash PoC claims Microsoft Defender still allows arbitrary file reads as SYSTEM on patched Windows, bypassing the CVE-2026-69414 fix.
Researcher MSNightmare released the ShieldCrash proof of concept showing Microsoft Defender can allegedly be made to read arbitrary files with SYSTEM privileges on fully patched Windows systems, bypassing the September 2026 fix for ShieldBreak (CVE-2026-69414). Microsoft has not confirmed the bypass, and the new flaw has no CVE assignment yet. The PoC repository contains C++ project files, a Warden.dll library, and an EICAR test archive, suggesting interaction with Defender's malware-detection and file-handling workflow. Reading files as SYSTEM could expose configuration files, credentials, private keys, and other users' data, though it does not enable code execution.
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Microsoft Issues Emergency Fixes After Massive Patch Tuesday
Microsoft shipped emergency out-of-band fixes to correct glitches from a record Patch Tuesday covering nearly 1,000 CVEs.
Dark Reading reports that Microsoft issued emergency fixes following a massive Patch Tuesday that addressed nearly 1,000 CVEs. The out-of-band updates correct glitches introduced by the record-sized monthly release. The brief excerpt names no specific CVEs, affected products, or actively exploited flaws.
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Plex Urges Immediate Updates After Patching Multiple Undisclosed Security Flaws
Plex patched multiple undisclosed flaws in Media Server 1.43.3 and Desktop 1.115.0, urging all users to update immediately.
Plex released fixes in Plex Media Server 1.43.3 and Plex Desktop 1.115.0 for multiple undisclosed security flaws, with CVE identifiers requested and details not yet published. Censys data shows more than 360,000 devices expose the Plex Media Server web interface. Past Plex flaws saw real exploitation, including CVE-2020-5741 (CVSS 7.2), used to implant a keylogger on a LastPass employee's home computer during the 2022 breach, and CVE-2025-34158 (CVSS 8.5), an authentication bug patched in August 2025.
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Microsoft Fixes 400 Flaws on August Patch Tuesday
Microsoft's August Patch Tuesday delivers fixes for 400 security vulnerabilities across its product lineup.
Microsoft released its August Patch Tuesday security updates, fixing 400 vulnerabilities, described as another massive monthly batch. The source text provides no breakdown of severity classes, affected products, or whether any flaws were actively exploited. Defenders should prioritize patching based on Microsoft's exploitation status ratings in the official bulletin.
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