SK Shieldus hack leaks SK Telecom security documents
SpilloverSpillover from the SK Shieldus incident · View original incident →SK Telecom's security documents were leaked through the SK Shieldus hack. The damage from the hack at SK Shieldus spread to SK Telecom.
Key facts
- Affected organization
- SK Telecom
- Original incident
- SK Shieldus hack leaks 15.1GB of client security data
- Incident type
- Data breach
- Occurred / detected
- Not confirmed
- Scale of damage
- Security documents leaked
- Cause / method
- Security documents leaked via the SK Shieldus hack
- Location
- South Korea
If your data was exposed
- Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organization’s official website or app.
- If you’ve suffered harm, report it. Call 118 (no area code) for privacy violations, contact the police for financial losses, and apply for dispute mediation to seek compensation.Personal Information Infringement Report Center ↗Korean National Police Agency cybercrime report ↗Personal Information Dispute Mediation Committee ↗
Timeline
- The leak of SK Telecom security documents via the SK Shieldus hack came to light.
Original incident
This is spillover from the SK Shieldus incident.
SK Shieldus hack leaks 15.1GB of client security data
Impact: 15.1GB of data related to 120 private companies and numerous public institutions
SK Shieldus was hacked in October 2025, leaking 15.1GB of client-related data. It was found that security monitoring system deployment materials and solution verification materials for 120 private companies and numerous public institutions were leaked through the personal email accounts of two employees that were connected to a honeypot while automatically logged in. The Personal Information Protection Commission (PIPC) launched an investigation, and SK Shieldus began a full review of 80,000 emails.
Related reports: 30 · last report →
1 related reports
Other incidents at SK Telecom
SK Telecom hack exposes personal and SIM data of 23.24 million people
23.2MImpact: Personal information and SIM data of 23.24 million people exposed
SK Telecom suffered a hack that exposed personal information, including SIM data, with 23.24 million people confirmed affected. Following the incident, SIM replacements and checks for personal data exposure began, and SK Telecom urged caution over spam and smishing exploiting the incident. The company was fined KRW 134.8 billion over the personal data breach and subsequently received an insurance payout.
Related reports: 466 · last report →SK Telecom acquittal upheld in e-prescription data leak case
An acquittal was finalized in the case over alleged personal data leaks from SK Telecom's electronic prescription service. The Supreme Court upheld the acquittal in the case.
Read on 경향신문 ↗
The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organization’s official statements for accurate details.