Gen Digital, formerly Symantec Corporation and NortonLifeLock, is sending data breach notifications to customers, informing them that hackers have successfully breached Norton Password Manager accounts in credential-stuffing attacks.However, we strongly believe that an unauthorized third party knows and has utilized your username and password for your account," NortonLifeLock said.In accessing your account with your username and password, the unauthorized third party may have viewed your first name, last name, phone number, and mailing address — NortonLifeLockFor customers utilizing the Norton Password Manager feature, the notice warns that the attackers might have obtained details stored in the private vaults.Update 1/14 - A Gen Digital spokesperson has sent BleepingComputer the following comment:Gen’s family of brands offers products and services to approximately 500 million users.Our security team identified a high number of Norton account login attempts indicating credential-stuffing attacks targeting our customers, and we quickly took a variety of actions to help secure our customer’s accounts and their personal information."