WASHINGTON — Boeing on Thursday confirmed that it had been hit by the WannaCry ransomware attack, but the company says the problem was limited to “a few machines” on its commercial side and did not spread into its defense business.

According to The Seattle Times, which broke the story Thursday, Boeing Commercial Airplanes’ chief engineer for production engineering Mike VanderWel issued a memo to employees shortly after the virus had been discovered. He believed that the cyber attack may have forced some of the machines used to produce the Boeing 777 to crash.

That lead to speculation within the defense community that the attack could have also impacted production of Boeing’s commercial derivative planes such as the U.S. Air Force’s KC-46 tanker or Navy’s P-8 maritime surveillance aircraft, or even compromised those planes’ components or computing equipment.

When Boeing confirmed the attack on Thursday night, officials downplayed the attack.

“Our cybersecurity operations center detected a limited intrusion of malware that affected a small number of systems,” Linda Mills, vice president of communications for Boeing Commercial Airplanes, said in a written statement. “Remediations were applied and this is not a production or delivery issue.”