F5 Stock (FFIV) Drops 5% after Revealing a Major Cyberattack

Shares of F5 Inc. (FFIV) dropped 5% on Wednesday after the cybersecurity company disclosed details of a major cyberattack. F5 believes the attack was carried out by a highly organized “nation-state threat actor.” The hacker had long-term access to the company’s internal systems, including the development and engineering.

Importantly, the attack was first found on August 9, 2025. F5 said it was granted a delay in public disclosure by the U.S. Department of Justice (DOJ) for national security reasons.

What Has Been Stolen?

The hackers stole certain files, such as parts of the source code for its main product, BIG-IP, which is used by several organizations (including governments) to manage network traffic and security.

Also, they stole information about undisclosed security flaws in the BIG-IP software that F5 was still working to fix. Finally, configuration details for a “small percentage” of F5’s customers were also compromised.

Has the Threat Been Contained?

F5 said it hired outside experts, including CrowdStrike (CRWD) and Mandiant, to investigate the incident. Since then, the company has released necessary software updates and has so far seen no signs of further malicious activity.

Also, the company confirmed there is no evidence that the hackers changed or modified its actual product software or the process used to build and release that software.

However, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) declared the F5 vulnerability a “significant cyber threat.” Also, it ordered federal agencies to update or disconnect any F5 technology immediately due to a nation-state hack. 

Is FFIV a Good Stock to Buy?

Turning to Wall Street, FFIV stock has a Hold consensus rating based on one Buy and nine Holds assigned in the last three months. At $331.14, the average F5 stock price target implies a 0.87% upside potential.

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