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Microsoft Patches Exploited UnDefend and RedSun Defender Zero-Days (opens in new tab)

Covers Critical SharePoint Zero-Day (CVE-2025-53770) Under Active ExploitationCovered by 3 sources See all sources covering this story including Techrights, kite.kagi.com

Covers 1 related story

cisa.gov·

Critical SharePoint Zero-Day (CVE-2025-53770) Under Active Exploitation

Discussed on Hacker News
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Covered in 4 articles

Techrights·

Links 22/05/2026: Ebola Crisis and Samsung Averts a Walkout With Big Bonuses

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kite.kagi.com·

Microsoft patches two exploited Defender zero-day flaws

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AboutDFIR·

InfoSec News Nuggets 05/21/2026 - AboutDFIR - The Definitive Compendium Project

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kite.kagi.com·

마이크로소프트, 악용된 두 개의 디펜더 제로데이 취약점 패치

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