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Microsoft Releases Fix for New Zero
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Serial Microsoft 0-day hunter drops yet another Defender exploit
Researcher Nightmare Eclipse released ShieldCrash, a Microsoft Defender zero-day PoC that bypasses September patches and reads files as SYSTEM.
Zero-day researcher Nightmare Eclipse (MSNightmare) published ShieldCrash, their 11th Microsoft zero-day, a proof-of-concept bypass of the ShieldBreak patch (CVE-2026-69414), which itself had bypassed the fix for RoguePlanet (CVE-2026-50656). ShieldCrash works on Windows 10, Windows 11, and Windows Server systems that have applied the September 2026 patches and allows arbitrary file reads as SYSTEM, though not arbitrary writes or a full SYSTEM shell. Microsoft has not said when it plans to patch the issue. The researcher recently also released zero-days affecting CrowdStrike Falcon (FalconFlank), Kaspersky endpoint antivirus (HardBreacher, patched), and Gen Digital's Avast (PrettyPrague).
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Chrome zero-day exploited in the wild, patch now! (CVE-2023-4863)
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CISA Adds Three Security Flaws with Active Exploitation to KEV Catalog
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Google Chrome 153 Released With 230 Security Fixes and Zero-Day Exploited in the Wild
Google released Chrome 153 with 230 security fixes, patching CVE-2026-87491, a V8 out-of-bounds write zero-day actively exploited in the wild.
Google shipped Chrome 153 (153.0.8010.36/.37) for Windows, macOS, and Linux with 230 security fixes, including CVE-2026-87491, a medium-severity V8 out-of-bounds write being exploited in the wild. The release also fixes five critical vulnerabilities: four in WebGL (two use-after-frees, an out-of-bounds write, a buffer overflow) and one use-after-free in Cast. High-severity V8 use-after-free and type-confusion defects are among the fixes, and Google has restricted technical details until most users are patched. Administrators should verify deployed versions on managed endpoints, as Chrome-derived browsers may follow different patch schedules.
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Chaotic Eclipse Released ShieldCrash, A PoC For Microsoft Defender Zero-Day
Researcher Chaotic Eclipse released ShieldCrash, a PoC showing Microsoft Defender's CVE-2026-69414 patch is incomplete, enabling arbitrary file reads as SYSTEM.
Security researcher Chaotic Eclipse published ShieldCrash, a proof-of-concept exploit for the Microsoft Malware Protection Engine privilege escalation vulnerability CVE-2026-69414 (ShieldBreak). The PoC performs arbitrary file reads with SYSTEM privileges on all supported Windows versions, including systems running the September 2026 security updates and Malware Protection Engine version 1.1.26080.3. The researcher claims Microsoft's patch fixed several exploit paths but missed a specific condition that still enables the attack. His recent releases also include zero-day PoCs targeting Nvidia, Kaspersky, Avast, and CrowdStrike Falcon.
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Windows Defender ShieldCrash 0-Day Lets Attackers Read Arbitrary Files as SYSTEM
Unpatched Windows Defender zero-day 'ShieldCrash' PoC lets local attackers read arbitrary files as SYSTEM, apparently bypassing the CVE-2026-69414 patch.
Researcher MSNightmare published a skeleton proof-of-concept for 'ShieldCrash', an unpatched Microsoft Defender flaw enabling arbitrary file reads with SYSTEM privileges that reportedly persists on supported Windows versions after September 2026 updates. It appears to bypass the recent fix for the Malware Protection Engine elevation-of-privilege flaw CVE-2026-69414 (ShieldBreak), patched in engine version 1.1.26080.3. SYSTEM-level file disclosure could expose credentials, application secrets and registry hives and support post-compromise reconnaissance. No active exploitation is confirmed and Microsoft had issued no specific patch or mitigation at disclosure time.
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Chrome Zero-Day CVE-2025-6554 Under Active Attack — Google Issues Security Update
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March 2021 Patch Tuesday: Microsoft fixes yet another actively exploited IE zero-day
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Largest Patch Tuesday since July includes two exploited in the wild, three critical vulnerabilities
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Microsoft Releases Record
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Google fixes eighth actively exploited Chrome zero
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WinRAR Zero-Day Under Active Exploitation
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August 2018 Microsoft Patch Tuesday fixes two flaws exploited in attacks in the wild
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January 2021 Patch Tuesday: Microsoft plugs Defender zero-day RCE
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U.S. CISA adds Google Chromium V8 flaw to its Known Exploited Vulnerabilities catalog
CISA added actively exploited Chrome V8 type-confusion flaw CVE-2026-85046 (CVSS 8.8) to its KEV catalog; Google patched it in Chrome 152.
CISA added CVE-2026-85046 (CVSS 8.8), a V8 type confusion flaw, to its Known Exploited Vulnerabilities catalog, requiring US federal agencies to patch by September 18, 2026. Google fixed it in Chrome Stable 152.0.7977.82/.83 for Windows and Mac and 152.0.7977.82 for Linux, alongside 11 other vulnerabilities. The bug lets a remote attacker execute arbitrary code inside the browser sandbox via a crafted HTML page and is the sixth actively exploited Chrome zero-day of 2026. Researcher Salvatore Gulizia (Serotav) reported it on August 4, 2026.
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Google fixes the sixth actively exploited Chrome zero
Google patched 12 Chrome flaws including actively exploited V8 type confusion zero-day CVE-2026-85046 (CVSS 8.8), enabling sandboxed remote code execution via crafted webpages.
Google released Chrome Stable 152.0.7977.82/.83 for Windows and Mac and 152.0.7977.82 for Linux, fixing 12 vulnerabilities including CVE-2026-85046, a type confusion in V8 with a CVSS score of 8.8. Google says an exploit exists in the wild, making this the sixth actively exploited Chrome zero-day of 2026. The bug affects the JavaScript and WebAssembly engine and allows arbitrary code execution inside the browser sandbox via a specially crafted HTML page. Researcher Salvatore Gulizia (Serotav) reported the flaw on August 4, 2026 and received a $1,000 bounty.
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