National Health Insurance Service (South Korea) Data Breach History
WebsiteThe National Health Insurance Service (NHIS) is South Korea’s statutory single-payer health insurer administering coverage for residents via nhis.or.kr.
This page shows all data breaches of National Health Insurance Service (South Korea). View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All National Health Insurance Service (South Korea) Breaches
National Health Insurance Service (South Korea) Data Breach Summary
This page tracks the National Health Insurance Service (South Korea) data breach history and cybersecurity incidents affecting National Health Insurance Service (South Korea) (South Korea). BreachHistory currently indexes 1 publicly disclosed or catalogued incident spanning 2026, with approximately 48.0 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 National Health Insurance Service (South Korea) 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, while 1 remain unverified claims pending independent verification.
Largest National Health Insurance Service (South Korea) Data Breaches
The largest indexed incidents include the 2026 South Korea NHIS — feijo dark-forums 48M record sale claim (unverified). Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by National Health Insurance Service (South Korea) or a regulator. Below is the list of large data breaches:
- 2026 2026 South Korea NHIS — feijo dark-forums 48M record sale claim (unverified) — about 48.0M records exposed · Unverified claim
What Information Was Exposed?
Depending on the incident, exposed data may include names, payment card and financial account data, dates of birth, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
National Health Insurance Service (South Korea) Data Breach 2026
At the time of this update, BreachHistory catalogues 1 2026 incident related to National Health Insurance Service (South Korea). Most recent entry: 2026 South Korea NHIS — feijo dark-forums 48M record sale claim (unverified). 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 National Health Insurance Service (South Korea) 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 National Health Insurance Service (South Korea) 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.