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Russian hackers exploit patched Microsoft Office bug in attacks

Newsroom - 02 February 2026 - 23:00

Ukraine's Computer Emergency Response Team (CERT) says that Russian hackers are exploiting CVE-2026-21509, a recently patched vulnerability in multiple versions of Microsoft Office.

Russian hackers exploit patched Microsoft Office bug in attacks
Ukraine's Computer Emergency Response Team (CERT) says that Russian hackers are exploiting CVE-2026-21509, a recently patched vulnerability in multiple versions of Microsoft Office.
Russian hackers Microsoft Office Vulnerability CVE-2026-21509

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