LOGO

F5 Networks Hack: Government Hackers Stole Code & Data

October 15, 2025
F5 Networks Hack: Government Hackers Stole Code & Data

F5 Networks Reports Long-Term Hacker Access

F5 Networks, a leading cybersecurity company, has revealed that government-sponsored hackers maintained prolonged access to its network.

This unauthorized access resulted in the theft of the company’s source code and sensitive customer data.

Discovery and Containment

The security breach was initially detected on August 9th. F5 Networks filed a report with the U.S. Securities and Exchange Commission on Wednesday, stating that containment measures are now believed to be effective.

The company, headquartered in Seattle, Washington, specializes in application security and cybersecurity solutions for large organizations and governmental entities.

Systems Compromised

Hackers gained access to the BIG-IP product development environment and the company’s knowledge management systems.

These systems contained source code and details of previously undisclosed security vulnerabilities.

Fortunately, F5 Networks reports no evidence of modifications to software during development or exploitation of the identified vulnerabilities.

Security Updates and Customer Impact

Several updates were released on Wednesday for the BIG-IP platform to address these security flaws. Customers were strongly advised to implement these patches immediately.

The hackers also reportedly downloaded configuration files and implementation details related to customer systems.

This information could potentially be used to identify and exploit design weaknesses, leading to further compromises.

Disclosure Delay

The U.S. Department of Justice permitted F5 Networks to postpone public disclosure of the breach.

While the reason for this delay remains undisclosed, the DOJ can authorize such actions if there is a significant risk to national security or public safety.

Wide-Ranging Customer Base

F5 Networks serves a vast clientele, including over 85% of the Fortune 500 companies.

Its customers span various sectors, including banking, technology, and critical infrastructure.

International Warnings and Emergency Directives

The U.K.’s National Cyber Security Centre issued a warning following F5’s disclosure, highlighting the potential for hackers to exploit F5 devices and software.

The Cybersecurity and Infrastructure Security Agency (CISA) has mandated that civilian federal agencies patch their systems by October 22nd under an emergency directive.

Attribution and Ongoing Investigation

The attacks have not been attributed to a specific government or hacking group.

A company spokesperson declined to provide further details regarding the number of affected customers or the initial point of entry for the hackers.

Recent Trend of Attacks

F5 Networks is the latest in a series of tech companies to fall victim to government-backed hacking attempts.

Recent incidents include breaches at Microsoft (attributed to China and Russia), Hewlett Packard Enterprise, and companies impacted by the Russian cyberattack on SolarWinds.

These events underscore the increasing sophistication and persistence of state-sponsored cyber threats.

#F5 Networks#cybersecurity#data breach#hacking#government hackers#code theft