Department of Homeland Security — Cyber Attacks, Breaches & Threat Activity

Threat entity extracted from intelligence sources

Frequency
27
occurrences
First Seen
November 3, 2025
Last Seen
August 27, 2026

Related Threat Clusters

Recent Intelligence Reports

  • ATF confirms “major incident” after recent Qilin breach claims — Bleepingcomputer · August 27, 2026
  • Qilin gang claims US Bureau of Alcohol, Tobacco, Firearms and Explosives — Cybernews · August 26, 2026
  • CyberScoop: Microsoft SharePoint attacks ensnare 400 victims, including US agencies — cyberscoop.com · August 13, 2026
  • >> Read this brief on krypteiasec.com — krypteiasec.com · July 26, 2026
  • Daily Threat Brief: July 24, 2026 — Buttondown · July 25, 2026
  • Hacktivists call out Trump by hacking and defacing US Army websites — Techcrunch · July 7, 2026
  • DHS confirms hackers breached HSIN info — Bleepingcomputer · July 1, 2026
  • Hackers breached DHS information-sharing network, people familiar say - Nextgov/FCW — Nextgov · June 30, 2026

CVSS v3.1 Breakdown