Russia-aligned threat actors are exploiting a flaw in MDaemon mail server software to run code on the server. Victims don’t have to open or click anything. ESET’s APT Activity Report for Q2–Q3 2026 describes an active campaign in Ukraine. ESET could not attribute it to a known Russia-aligned group. Mdaemon mail server flaw According to […]
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Russian Hackers Exploit MDaemon Mail Server Flaw to Install Backdoors Without User Interaction