APT28 Tied to CVE-2026-21513 MSHTML 0-Day Exploited Before Feb 2026 Patch Tuesday

A recently disclosed security flaw patched by Microsoft may have been exploited by the Russia-linked state-sponsored threat actor known as APT28, according to new findings from Akamai. The vulnerability in question is CVE-2026-21513 CVSS score: 8.8, a high-severity security feature bypass affecti...