Tech giant Ingram Micro has confirmed that some of its internal systems were hit by ransomware—malicious software that locks up data until a payment is made. The company hasn’t disclosed whether any customer or partner data was compromised, but it’s working to contain the breach.

Editor’s Note: Ingram Micro is a massive distributor in the tech supply chain, so a ransomware attack here could ripple out to countless businesses that rely on them. It’s another reminder that even big players aren’t immune to cyber threats, and companies everywhere should be tightening their digital defenses.