The January 2026 CVE landscape highlights 23 critical vulnerabilities marking a 5% increase from December 2025. Notable among these is APT28's exploitation of a Microsoft Office zero-day (CVE-2026-21509) to target government and business users for email collection and persistent access. Other significant flaws include authentication bypass in SmarterMail, Modular DS WordPress plugin vulnerabilities, and legacy issues like CVE-2009-0556 in Microsoft Office. The report emphasizes the persistence of state-sponsored zero-day exploits and the critical nature of addressing authentication bypass vulnerabilities to reduce enterprise risk.
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