People search Dun & Bradstreet data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 3 Dun & Bradstreet-linked incidents, with headline counts up to 33.6M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Dun & Bradstreet breach history matters
Dun & Bradstreet operates in Finance. 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
2017 — — Dun & Bradstreet: A 52GB database from Dun & Bradstreet's NetProspex…
Cataloged incident. Mar 2017. A 52GB database from Dun & Bradstreet's NetProspex service was exposed containing ~33.6M corporate and government employee records. Included names, job titles, emails, phones, work locations. DoD had 101k records; USPS 88k; AT&T, Boeing, Dell, FedEx, IBM, Xerox heavily represented. Troy Hunt obtained and published findings. D&B denied breach of its systems. Exposed categories include Names, job titles, emails, phones, work locations. BreachHistory cites approximately 33.6M+ affected records in this row. See the dun-bradstreet2017 and canonical BreachHistory entry.
2014 — — Dun & Bradstreet: Data breach reported, 1.0M records
Cataloged incident. Data breach reported. Reference: http://www.usatoday.com/story/cybertruth/2013/09/26/lexisnexis-dunn--bradstreet-altegrity-hacked/2878769/ BreachHistory cites approximately 1M+ affected records in this row. See the dun-bradstreet2014 and canonical BreachHistory entry.
2013 — — Dun & Bradstreet: Hackers stole millions of social security numbers -…
Cataloged incident. Hackers stole millions of social security numbers - including Michelle Obama's - from 3 large US data brokers BreachHistory cites approximately 1M+ affected records in this row. See the dun-bradstreet2013 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple Dun & Bradstreet 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 Dun & Bradstreet company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/dun-bradstreet · Latest: dun-bradstreet2017.
Sources: BreachHistory catalog (3 rows for Dun & Bradstreet), company and regulator disclosures cited in individual breach records.