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Steam SMS 2FA Logs Allegedly Leaked on Dark Web, Valve Denies Breach

89 million SMS authentication logs, lacking sensitive credentials, are reportedly for sale, prompting security warnings about SMS-based 2FA vulnerabilities.

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Auf dem Bild ist ein Smartphone zu sehen, das das Steam-Logo anzeigt.
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Overview

  • A Dark Web seller claims to offer 89 million Steam SMS two-factor authentication logs for $5,000, containing phone numbers and expired codes but no login credentials.
  • Valve and Twilio have officially denied any breaches or partnerships related to the alleged dataset, and its authenticity remains unverified.
  • Security experts emphasize the vulnerabilities of SMS-based two-factor authentication and recommend switching to app-based methods like Steam Guard for stronger protection.
  • Users are advised to update their Steam passwords, enable app-based 2FA, and review connected devices for unauthorized access as precautionary measures.
  • The origin of the dataset is unclear, with speculation pointing to a potential leak from a third-party SMS provider rather than a direct breach of Steam systems.