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Microsoft Security Blog · September 22, 2026

EvilTokens: contain device-code phishing beyond a password reset

analysis AI Red TeamingAgent Security
Why it matters

Microsoft documents EvilTokens campaigns that trick users into authorizing attacker sessions through the legitimate device-code login flow. AI assists lure writing and compromised-inbox triage. The report connects stolen tokens to device registration, Graph reconnaissance and inbox rules, and provides detection queries and response guidance.

My takeaway: Block device-code flow where unused and scope necessary exceptions. Investigate new devices and inbox rules after suspicious sign-ins. Revoke refresh tokens and contain the account: Microsoft warns that existing access tokens can remain usable for up to an hour after ordinary session revocation.
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OWASP GenAI Security Project · guide

OWASP Top 10 for Agentic Applications for 2026

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