People search U.S. Department of the Treasury data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 2 U.S. Department of the Treasury-linked incidents, with headline counts up to 2.4M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why U.S. Department of the Treasury breach history matters
U.S. Department of the Treasury operates in Government (United States). Across indexed rows, recurring themes include mixed intrusion and disclosure events. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2025 — 2.4M affected
Cataloged incident. U.S. Department of the Treasury experienced a network compromise in January 2025. Treasury sanctioned Zhou Shuai and Shanghai Heiying Information Technology for illegally acquiring and selling data from U.S. critical infrastructure networks. Separate OCC breach: attackers gained access to 103+ email accounts with ~150,000 emails over a year. Exposed categories include Sensitive government and financial institution data. BreachHistory cites approximately 2.4M+ affected records in this row. See the us-treasury2025 and canonical BreachHistory entry.
2024 — Silk Typhoon, BeyondTrust
Cataloged incident. Chinese APT Silk Typhoon. BeyondTrust API. Workstations, unclassified documents. Exposed categories include Federal systems. No attested victim count is published for this row yet. See the us-treasury2024 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple U.S. Department of the Treasury catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Bookmark the U.S. Department of the Treasury company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/us-treasury · Latest: us-treasury2025.
Sources: BreachHistory catalog (2 rows for U.S. Department of the Treasury), company and regulator disclosures cited in individual breach records.