Last week, a hacker claimed to have stolen 33 million phone numbers from Twilio, a U.S. messaging giant. Twilio confirmed that "threat actors" were able to identify phone numbers of Authy users, a popular two-factor authentication app owned by Twilio. The hackers accessed this data through an unauthenticated endpoint, prompting Twilio to secure it and advise Authy users to update their apps for security. While having a list of phone numbers may not seem dangerous, it can lead to phishing attacks targeting Authy users. Experts warn that hackers can now impersonate Authy/Twilio to trick users into revealing sensitive information. This incident comes after Twilio suffered a larger data breach in 2022, resulting in the theft of employee credentials and the compromise of Authy accounts. Twilio urges users to stay vigilant against phishing attacks and take necessary security measures.