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Microsoft releases urgent Office patch. Russian-state hackers pounce. - Ars Technica

AI Summary1 min read

TL;DR

Microsoft issued an emergency patch for a critical Office vulnerability (CVE-2026-21509) after Russian-state hackers exploited it within days to target Ukraine and EU governments with espionage malware.

  1. Microsoft releases urgent Office patch. Russian-state hackers pounce.  Ars Technica
  2. APT28 Uses Microsoft Office CVE-2026-21509 in Espionage-Focused Malware Attacks  The Hacker News
  3. Microsoft Rushes Emergency Patch for Office Zero-Day  Dark Reading
  4. Russian Hackers Weaponize Microsoft Office Bug in Just 3 Days  Dark Reading
  5. APT28 Exploits Microsoft Office Flaw to Target Ukraine and EU Governments  Odessa Journal

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