Russian hackers are exploiting recently patched Microsoft Office vulnerability (CVE-2026-21509)
Russian hackers are exploiting recently patched Microsoft Office vulnerability (CVE-2026-21509) 2026-02-03 at 17:21 By Zeljka Zorz 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 week. The exploitation CVE-2026-21509 allows unauthorized attackers to bypass a security feature (OLE mitigations in Microsoft […]