Dun & Bradstreet Data Breach History

This page tracks the Dun & Bradstreet data breach history and cybersecurity incidents affecting Dun & Bradstreet. BreachHistory currently indexes 3 publicly disclosed or catalogued incidents spanning 2013 through 2017, with approximately 35.6 million records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.

The Dun & Bradstreet breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed.

Largest Dun & Bradstreet Data Breaches

The largest indexed incidents include the 2017 — Dun & Bradstreet: A 52GB database from Dun & Bradstreet's NetProspex…, the 2014 — Dun & Bradstreet: Data breach reported, 1.0M records, and the 2013 — Dun & Bradstreet: Hackers stole millions of social security numbers -…. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by Dun & Bradstreet or a regulator. Below is the list of large data breaches:

• 2017 2017 — Dun & Bradstreet: A 52GB database from Dun & Bradstreet's NetProspex… — about 33.6M records exposed · Catalogued incident
• 2014 2014 — Dun & Bradstreet: Data breach reported, 1.0M records — about 1.0M records exposed · Catalogued incident
• 2013 2013 — Dun & Bradstreet: Hackers stole millions of social security numbers -… — about 1.0M records exposed · Catalogued incident

What Information Was Exposed?

Depending on the incident, exposed data may include email addresses, phone numbers, names, physical addresses, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.

Dun & Bradstreet Data Breach 2026

At the time of this update, no Dun & Bradstreet data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.

What To Do If You Were Affected

If you believe your account may have been involved in a Dun & Bradstreet data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.

This Dun & Bradstreet breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.