Russian state-sponsored actors known as APT28 have initiated a sophisticated cyber espionage campaign targeting high-value government and military entities across Europe. The primary targets include maritime and transport organizations in nations such as Poland, Ukraine, and Turkey. The attackers are actively exploiting a critical vulnerability in Microsoft Office, tracked as CVE-2026-21509. This security flaw allows […] The post APT28 Hackers Exploiting Microsoft Office Vulnerability to Compromise Government Agencies appeared first on Cyber Security News.