Levi Strauss cyberattack has exposed certain corporate information after an unauthorized third party gained access to company files through compromised employee computers, according to a filing with the U.S. Securities and Exchange Commission.

Levi Strauss & Co. said it recently detected a cybersecurity incident involving unauthorized access to three company-issued computers. The company said the access was enabled through social engineering techniques, allowing the attackers to reach company files.

According to the filing, the company initiated its response protocols after detecting the incident and implemented containment measures. It also launched an investigation that remains ongoing a...