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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

More from The Hacker News 2 Mar 2026, 11:36 p.m. Actively exploited CVE-2026-21513 0-Day APT28 Bypass CVE Disclosure Flaw Framework Microsoft Nation State Patch Patch Tuesday Russia Threat Actor Vulnerability

A Russia-linked threat actor has been attributed to a cyber espionage operation targeting webmail servers such as Roundcube, Horde, MDaemon, and Zimbra via cross-site scripting (XSS) vulnerabilities, including a then-zero-day in MDaemon, according to new findings from ESET

More from The Hacker News 15 May 2025, 10:05 p.m. 0-Day Antivirus APT28 Government Hacking Russia Threat Actor Vulnerability XSS