Ace Hardware is currently unable to process online orders due to a malicious cyberattack.
The cyber incident affected warehouse management, invoice, and delivery systems.
CEO John Venhuizen sent a memo detailing the impact of the attack on shipments.
Approximately 1,202 out of 1,400 servers and 3,500 networked devices were impacted by the attack.
Half of the affected servers and devices have been restored as of early Thursday morning.
Ace Hardware warned retailers about potential cybercriminals taking advantage of the situation.
The details of the attack, including the responsible party and method of access, are still unknown.
Ace Hardware operates on a retailer-owned model and has over 5,800 stores.
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