FBI Declares Surveillance System Breach a ‘Major Incident’

The FBI disclosed a China-linked breach of an internal surveillance system used to manage wiretaps and related operations, which was designated a “major incident” after attackers accessed pen‑register and trap‑and‑trace returns and PII of subjects; the intrusion, attributed to sophisticated actor tactics leveraging a commercial ISP vendor infrastructure, was localized to FBI systems in the U.S. Virgin Islands and prompted interagency response and a Justice Department working group to improve cyber resilience.