F5 Reveals Nation State Breach and Urges Immediate Patching

F5 Reveals Nation State Breach and Urges Immediate Patching

F5 has admitted a nation state actor has stolen source code and information on undisclosed vulnerabilities.

The US government has urged federal agencies to take immediate action after security vendor F5 revealed it has been breached by a nation-state actor.

In August 2025, we learned a highly sophisticated nation-state threat actor maintained long-term, persistent access to, and downloaded files from, certain F5 systems.

These systems included F5's BIG-IP product development environment and engineering knowledge management platforms.

F5 has taken extensive actions to contain the threat actor and believes their containment efforts have been successful.

Author's summary: F5 reveals nation-state breach.

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Infosecurity Magazine Infosecurity Magazine — 2025-10-16

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