July 21, 2025 - Cyber Briefing

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👉 What's happening in cybersecurity today?

Microsoft patches critical SharePoint RCE under active attack, AppLocker flaw allows bypass via version misconfig, and PoisonSeed phishing bypasses FIDO protections. Arcadia Finance drained of $3.5M in WETH, ATM jackpotting hits Michigan for $107K, and ransomware cripples Korea’s top guarantee insurer. Free decryptor released for Phobos and 8Base, Armenian Ryuk hacker indicted via BTC tracing, and Roblox’s AI teen safety tools raise privacy concerns.

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