# ATF classifies cyberattack on standalone system as major incident

_Published Thursday, August 27, 2026 at 2:07 PM EDT · Security · Latest · Tier 1 — Major_

![ATF classifies cyberattack on standalone system as major incident — Primary](https://techcrunch.com/wp-content/uploads/2026/08/atf-police-1233760688.jpg?w=1024)

The Bureau of Alcohol, Tobacco, Firearms and Explosives has classified a cyberattack on one of its systems as a major incident, a designation that requires formal notification to Congress. ATF said the affected system was separate from its main network and contained information including targets of ATF investigations. The Qilin ransomware gang has claimed responsibility, but TechCrunch said the group provided no evidence such as leaked-data samples.

## Sources

- [TechCrunch](https://techcrunch.com/2026/08/27/atf-declares-major-incident-as-ransomware-gang-claims-hack/)

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Canonical: https://techandbusiness.org/newswire/7eHUA6uKw0gyxIqyLVA3_Q
Published: 2026-08-27T18:07:30.304Z
Story chronology: 2026-08-27T17:54:23.000Z
Retrieved: 2026-10-11T21:50:31.507Z
Publisher: Tech & Business (techandbusiness.org)