Winbuzzer Hackers Exploit Device Code Phishing to Compromise Microsoft Entra Accounts
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Hackers are targeting Microsoft Entra accounts through a combination of device code phishing and voice phishing (vishing). Victims, primarily from technology, manufacturing, and financial sectors, are deceived into entering device codes that attackers use to gain unauthorized access. The attacks exploit the OAuth 2.0 Device Authorization flow, utilizing legitimate Microsoft OAuth client IDs.
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Updated 182d ago How this analysis works
Timeline
2026-02-19
Bleepingcomputer reports on device code vishing attacks
2026-02-20
Winbuzzer reports on phishing defenses being bypassed
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