NVIDIA was forced to take parts of its business offline due to a cyber attack
The Telegraph reports US chipmaker is currently investigating a potential cyber attack on their systems.

The company has no official information yet but confirms that there was an indictment that is currently being investigated. NVIDIA was forced to disable parts of its systems such as email systems and developer tools that might have been compromised.
We are investigating an incident. We don’t have any additional information to share at this time.
— Nvidia spokesman
It is believed that a potential intrusion might have compromised internal systems, which forced the company to take them offline. Sources at Telegraph claim that the mailing system was partially working on Friday though, but the company is not yet aware of the source of this intrusion.
Assuming that mail servers were turned off, it is possible that the company’s internal and confidential information might have been accessed.
The cyberattack began almost at the same time as Russian Federation invaded Ukraine. Many countries around the world have increased security levels to prepare for potential cyber-attacks.
NVIDIA now has to ensure that their systems are clean and that the software being shipped to customers is clean of any potentially malicious code that might have been added during the intrusion.
Source: The Telegraph