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Ukrainian Hackers Expose Russian Naval Secrets in Operation Poseidon

Ukrainian Hackers Expose Russian Naval Secrets in Operation Poseidon

First seen 21 Sep 2026, 11:22 UTC

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ThreatCluster AI
ThreatCluster September 21, 2026 at 13:53 UTC
  • Ukrainian Militant's Operation Poseidon breached Russian naval files, revealing 70 projects.
  • The leaked data includes sensitive technical documentation on submarines and naval systems.
  • The scale of the breach and the authenticity of the data remain unverified by independent sources.

Ukrainian hackers from the group Ukrainian Militant executed a cyber operation named 'Poseidon,' breaching Russian naval files and obtaining sensitive documentation from 70 projects. The compromised data includes technical details related to submarines, warships, and various naval technologies, some marked as 'secret' and 'top secret.' The hackers claimed to have accessed information on nuclear-powered submarines, frigates, and advanced systems for underwater vehicles. The operation's scale and the authenticity of the leaked data have not been independently verified, with some documents analyzed by InformNapalm confirming only a fraction of the claims. The breach raises concerns about the operational security of Russian military and defense enterprises, as the full extent of the data obtained remains unknown. The operation follows previous significant leaks involving Russia's defense industry, indicating a pattern of targeted cyber operations against Russian military assets.

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Timeline

2026-09-19
Operation Poseidon announced
Ukrainian Militant declared the completion of a large-scale cyber operation targeting Russian military systems.
Unn.Ua
2026-09-20
Ukrainian hackers claim extensive data theft
Ukrainian Militant reported obtaining documentation related to 70 Russian naval projects, including submarines and control systems.
United24Media
2026-09-21
Details of the breach emerge
Reports indicate the hackers accessed sensitive materials from major Russian naval organizations, including design bureaus and research institutes.
United24Media

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