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ZDNet
Microsoft fixes 421 bugs and a Windows zero-day in August Patch Tuesday
Microsoft's latest Patch Tuesday update delivers critical security fixes, addressing 421 vulnerabilities across various products, including a zero-day flaw that has already been exploited. With a focus on user security, this update enhances functionality in key features like File Explorer and Windows Hello. Users are encouraged to ensure their systems are updated to mitigate potential security risks associated with the unpatched vulnerabilities.
Act nowConfidence: HighImmediate horizonCybersecurity risk: High
Published 12 Aug 2026, 16:01 UTC3 min read
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Summary
TL;DR
- 421 vulnerabilities fixed in August Patch Tuesday update
- Patches a zero-day flaw exploited in the wild
- Improvements made to File Explorer and Windows Hello
- Considerations for Windows 10 users on Extended Security Updates
- AI tools utilized to enhance vulnerability detection
Interesting facts
- The patch fixes two other zero-day vulnerabilities not yet exploited.
- This update emphasizes AI's role in reducing time for vulnerability discovery.
- The number of fixed vulnerabilities in August is lower than July's 570.