- Russian-state hackers exploit Office vulnerability to infect computers Ars Technica
- APT28 Uses Microsoft Office CVE-2026-21509 in Espionage-Focused Malware Attacks The Hacker News
- Russian Hackers Weaponize Microsoft Office Bug in Just 3 Days Dark Reading
- Microsoft Office Zero-Day (CVE-2026-21509) – Emergency Patch Issued for Active Exploitation The Hacker News
- APT28 Exploits Microsoft Office Flaw to Target Ukraine and EU Governments Odessa Journal
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