#cve-2026-21509

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Information security
fromSecurityWeek
19 hours ago

Russia's APT28 Rapidly Weaponizes Newly Patched Office Vulnerability

APT28 quickly weaponized Microsoft's patched Office vulnerability CVE-2026-21509, deploying droppers and additional malware such as MiniDoor within days of the patch release.
Information security
fromThe Hacker News
21 hours ago

APT28 Uses Microsoft Office CVE-2026-21509 in Espionage-Focused Malware Attacks

Russia-linked UAC-0001 exploited CVE-2026-21509 in malicious Office RTFs to deliver MiniDoor and PixyNetLoader targeting users in Ukraine, Slovakia, and Romania.
Information security
fromTheregister
1 day ago

Russia-linked attackers abuse new Microsoft Office zero-day

Russia-linked APT28 (Fancy Bear) is exploiting Microsoft Office zero-day CVE-2026-21509 to target Ukrainian government and EU organizations.
#microsoft-office
fromZDNET
1 week ago
Information security

Use Microsoft Office? Hackers can infect your PC with a malicious document - patch it ASAP

fromZDNET
1 week ago
Information security

Use Microsoft Office? Hackers can infect your PC with a malicious document - patch it ASAP

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