People search Woori Bank data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 1 Woori Bank-linked incident (1 company-confirmed), with headline counts up to 18K+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Woori Bank breach history matters
Woori Bank operates in Finance (South Korea). Across indexed rows, recurring themes include third-party and supply-chain exposure. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2026 — 17,551 customers; vendor retained NFT-service CI data
Verified breach. Woori Bank disclosed that personal information of 17,551 customers who had consented to NFT-platform-related services was leaked after an employee at an external software developer retained customer data without authorization and uploaded it to a developer platform. Korea Herald (5 July 2026) reported the leaked fields included connecting information (CI)—an encrypted online identity token—and customer nicknames; phone numbers, resident registration numbers, and home addresses were not compromised. Data had been pr Exposed categories include Connecting information (CI) and nicknames (no phone/RRN/address per bank). BreachHistory cites approximately 18K+ affected records in this row. See the woori-bank-nft-vendor 2026 record and canonical BreachHistory entry.
Patterns and analysis
- Third-party and supply-chain exposure — appears across multiple Woori Bank 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 Woori Bank company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/woori-bank · Latest: woori-bank-nft-vendor2026.
Sources: BreachHistory catalog (1 row for Woori Bank), company and regulator disclosures cited in individual breach records.