On October 15, 2025, F5 Networks announced a breach that involved a nation‑state‑affiliated hacking group. The attackers gained long‑term access to the network segment used by F5 to build and distribute updates for its BIG‑IP line of server appliances. During the intrusion, the group downloaded proprietary BIG‑IP source code, obtained information on private, unpatched vulnerabilities, and captured customer configuration settings. These assets give attackers a detailed map of potential weaknesses that could be exploited in supply‑chain attacks, threatening thousands of networks—including those of U.S. federal agencies and Fortune 500 companies—that rely on BIG‑IP devices. The breach also raises concerns about credential theft and the misuse of sensitive configuration data. Federal officials have warned that the “imminent threat” could allow the hackers to target a wide range of organizations, underscoring the urgency for BIG‑IP users to review security practices and implement additional safeguards.