US Office of Personnel Management (2nd Breach) Data Breach History
WebsiteUS Office of Personnel Management manages federal workforce; victim of major 2015 breach.
This page shows all data breaches of US Office of Personnel Management (2nd Breach). View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All US Office of Personnel Management (2nd Breach) Breaches
US Office of Personnel Management (2nd Breach) Data Breach Summary
This page tracks the US Office of Personnel Management (2nd Breach) data breach history and cybersecurity incidents affecting US Office of Personnel Management (2nd Breach) (United States). BreachHistory currently indexes 2 publicly disclosed or catalogued incidents spanning 2010 through 2015, with approximately 43.0 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 US Office of Personnel Management (2nd Breach) 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 US Office of Personnel Management (2nd Breach) Data Breaches
The largest indexed incidents include the 2015 — US Office of Personnel Management (2nd Breach): Attackers have targeted the… and the 2010 — US Office of Personnel Management (2nd Breach): attackers have targeted the…. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by US Office of Personnel Management (2nd Breach) or a regulator. Below is the list of large data breaches:
- 2015 2015 — US Office of Personnel Management (2nd Breach): Attackers have targeted the forms submitte… — about 21.5M records exposed · Catalogued incident
- 2010 2010 — US Office of Personnel Management (2nd Breach): attackers have targeted the forms submitte… — about 21.5M records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include email addresses, passwords, phone numbers, names, profile information, account identifiers, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
US Office of Personnel Management (2nd Breach) Data Breach 2026
At the time of this update, no US Office of Personnel Management (2nd Breach) 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 US Office of Personnel Management (2nd Breach) 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 US Office of Personnel Management (2nd Breach) 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.