It’s the latest incident involving the theft of customer passwords of late.

Norton LifeLock provides identity protection and cybersecurity services. Gen Digital said it sent notices to about 6,450 customers whose accounts were compromised. The notice was sent to customers that it believes use its password manager feature, because the company cannot rule out that the intruders also accessed customers’ saved passwords. “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,” the data breach notice said. The company said it found that the intruders had compromised accounts as far back as December 1, close to two weeks before its systems detected a “large volume” of failed logins to customer accounts on December 12. It’s why two-factor authentication, which Norton LifeLock offers, is recommended, as it blocks attackers from accessing someone’s account with just their password.

In a notice to customers, Gen Digital, the parent company of Norton LifeLock, said that the likely culprit was a credential stuffing attack - where previously exposed or breached credentials are used to break into accounts on different sites and services that share the same passwords - rather than a compromise of its systems. Thousands of Norton LifeLock customers had their accounts compromised in recent weeks, potentially allowing criminal hackers access to customer password managers, the company revealed in a recent data breach notice.

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