ATF Data Breach 2026: What Qilin Ransomware Leaked and Why
Quick Answer: The ATF confirmed a ransomware breach of its CALEA electronic-surveillance system on August 26, 2026. The Qilin ransomware gang claimed responsibility and published roughly 6.3GB of files on September 1, including investigation-specific folders, phone/device extractions, and forensic data. The ATF says its main network was unaffected, but hasn’t confirmed the scope or authenticity of what was leaked, and the DOJ classified it a “major incident” requiring congressional notification.
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