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Russian Global Webmail Espionage

July 23, 2026 · Unit 42 · Severity: MEDIUM

Unit 42 reveals a Russian cyberespionage campaign that injects JavaScript into Zimbra webmail servers to steal credentials, highlighting a global threat to webmail systems.

Key Takeaways

  • Russian cyberespionage campaign targets Zimbra webmail servers globally.
  • Attackers use JavaScript injection to steal credentials from webmail.
  • Unit 42 details the campaign and its credential theft techniques.
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