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Russian hackers are exploiting recently patched Microsoft Office vulnerability (CVE-2026-21509)
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Russian hackers are exploiting recently patched Microsoft Office vulnerability (CVE-2026-21509)


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Russian state-sponsored hackers Fancy Bear (aka APT 28) are exploiting CVE-2026-21509, a Microsoft Office vulnerability for which Microsoft released an emergency fix last …

First seen on helpnetsecurity.com

Jump to article: www.helpnetsecurity.com/2026/02/03/russian-hackers-are-exploiting-recently-patched-microsoft-office-vulnerability-cve-2026-21509/

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