People search KT Corporation data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 2 KT Corporation-linked incidents (1 company-confirmed), with headline counts up to 8.7M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why KT Corporation breach history matters
KT Corporation operates in Technology. 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
2025 — illegal femtocell / mini base-station interception (~5,561 data victims)
Verified breach. KT Corporation confirmed in September 2025 that attackers connected illegal mini base stations (femtocells) to its mobile network and intercepted subscriber transmissions. About 19,000 customers connected to the rogue cells; KT told regulators that personal/subscriber data—including IMSI identifiers stored on SIMs—may have been stolen for 5,561 of them. The company said it contacted affected customers, offered free SIM replacement and USIM protection, and reported to PIPC. The incident followed SK Telecom’s much la Exposed categories include IMSI and related subscriber authentication/identity data (per KT/PIPC summaries). BreachHistory cites approximately 6K+ affected records in this row. See the kt-femtocell2025 and canonical BreachHistory entry.
2012 — — KT Corporation: Two suspects reportedly earnt an estimated $877,000…
Cataloged incident. Two suspects reportedly earnt an estimated $877,000 by selling the contact information and plan details of 8.7 million KT subscribers, almost half of the carrier's total customers. BreachHistory cites approximately 8.7M+ affected records in this row. See the kt-corporation2012 and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple KT Corporation 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: Review OAuth app permissions and revoke unused third-party integrations.
- Step 5: Bookmark the KT Corporation company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/kt-corporation · Latest: kt-femtocell2025.
Sources: BreachHistory catalog (2 rows for KT Corporation), company and regulator disclosures cited in individual breach records.