Lockheed Martin announced Saturday it successfully thwarted a "significant and tenacious attack" on the company's information systems network.
The world's largest aerospace company and major defense contractor to the Pentagon, Lockheed Martin manufactures the F-16, F-22 and F-35 fighter jets as well as spy satellites, warships and arms systems marketed worldwide.
"As a result of the swift and deliberate actions taken to protect the network and increase IT security, our systems remain secure; no customer, program or employee personnel data has been compromised," Lockheed Martin said a statement.
Last week's attack reportedly may be tied to an incident in March, when EMC Corporation's RSA Security Division, which supplies the SecurID electronic tokens that employees and government officials use to access the network from outside their offices, sustained a data breach.
According to RSA officials, that incident could potentially have compromised some of its products, The New York Times reported.
The cyberattack on Lockheed Martin's information systems may have been tied to that breach. But hacking attempts on military contractors occur everyday, so highly classified data cannot be accessed remotely.
"However, to counter any threats, we regularly take actions to increase the security of our systems and to protect our employee, customer and program data," Lockheed Martin spokesman Jeffrey Adams said in a statement.
"We have policies and procedures in place to mitigate the cyberthreats to our business, and we remain confident in the integrity of our robust, multilayered information systems security," the company stated.
The New York Times contributed to this report.