Who was sanctioned, and for what?

Using credentials stolen elsewhere, attackers logged in en masse on the websites of GS SHOP (June 2024 to February 2025) and GS25 (December 2024 to January 2025) and obtained data on 1,581,025 and 79,128 people respectively; GS Retail Co., Ltd. detected neither the bursts of login attempts from the same IP addresses nor the rising number of failed attempts, and after the first discovery at GS25 did not stop the parallel attack on GS SHOP. The authority also found an inadequate data protection organisation and that 1,599 further people were notified more than 72 hours late, imposed a penalty surcharge of 12,836,000,000 KRW and an administrative fine of 3,000,000 KRW (12,839,000,000 KRW in total) and ordered detection measures and a review of the data protection organisation.

Authority / court

Personal Information Protection Commission (PIPC, 개인정보보호위원회)

Area of law

Data protection · Data breaches and data security

Legal basis

Personal Information Protection Act (개인정보 보호법) Art. 29, Art. 34(1); Sanktion nach Art. 64-2(1) Nr. 9

Action

Fine

Status of proceedings

unknown

Sector

Retail and e-commerce

Culpability

negligent

Mitigating circumstances

Reduction of 30% because no benefit was derived and 40% for cooperation, remediation and protective efforts (ISMS-P certification, self-regulation, privacy impact assessment); increase of 50% because the infringement lasted more than two years.

Liability of senior managers

The company was ordered to deploy dedicated data protection staff and to define the powers and responsibility of its chief privacy officer (CPO) clearly.

Published

31 Aug 2026

Original amount 12,839,000,000 KRW, converted at the ECB reference rate of 26 Aug 2026.

Checked against the official source on 4 Oct 2026 · Direct link

Attackers copied certificates from lost femtocells of KT Corporation into home-made devices, stayed connected to the mobile network undetected for around eleven months, intercepted data on 16,647 subscribers (phone number, IMSI, IMEI) and used intercepted confirmation codes to trigger unauthorised mobile payments of around 240 million KRW affecting 368 people. For inadequate access control – certificates valid for ten years, no IP restriction, no detection of unknown cell IDs – the authority imposed a penalty surcharge of 53,979,000,000 KRW and ordered vulnerability checks and a stronger role for the chief privacy officer.

Authority / court

Personal Information Protection Commission (PIPC, 개인정보보호위원회)

Area of law

Data protection · Data breaches and data security

Legal basis

Personal Information Protection Act (개인정보 보호법) Art. 29, Sanktion nach Art. 64-2(1) Nr. 9; gesonderter Beschluss 제2026-015-094호: Art. 63(1)

Action

Fine

Status of proceedings

unknown

Sector

Telecoms, IT and software

Culpability

negligent

Mitigating circumstances

Reduction of 30% because no benefit was derived and a further 50% for cooperation, remediation, compensation of those affected and protective efforts; increase of 50% because the infringement lasted more than two years.

Liability of senior managers

The company was ordered to define the responsibility and role of its chief privacy officer (CPO) for the whole company clearly and to revise its governance.

Published

30 Jul 2026

Original amount 53,979,000,000 KRW, converted at the ECB reference rate of 29 Jul 2026.

Checked against the official source on 4 Oct 2026 · Direct link

A former employee used authentication signing keys that had been accessible to him in plain text during his employment and were neither renewed nor destroyed after he left to create forged tokens and, from April to November 2025, retrieve data on around 33.22 million customers and delivery data on around 4.33 million other people. For inadequate security measures the authority imposed a penalty surcharge of 423,575,000,000 KRW on Coupang Corp. and, for late notification and failure to delete, an administrative fine of 16,800,000 KRW (423,591,800,000 KRW in total) and criticised the exclusion of the chief privacy officer from the internal investigation. A separate decision on the same day imposed a further 201,106,000,000 KRW for collecting behavioural data on third-party websites and apps without consent.

Authority / court

Personal Information Protection Commission (PIPC, 개인정보보호위원회)

Area of law

Data protection · Data breaches and data security

Legal basis

Personal Information Protection Act (개인정보 보호법) Art. 29, Art. 34(1), Art. 21(1), Art. 31(6), Art. 63(2); Sanktion nach Art. 64-2(1) Nr. 9

Action

Fine

Status of proceedings

unknown

Sector

Retail and e-commerce

Culpability

negligent

Repeat case

yes

Mitigating circumstances

Reduction of 30% because no benefit was derived and 50% for remediation, compensation, certification and proportionality; increases of 25% (duration of the infringement), 30% (at least two previous penalties) and 10% (obstruction of the investigation).

Liability of senior managers

The chief privacy officer (CPO) was excluded from the internal investigation and publication; the company was ordered to set up governance that secures the CPO’s independent work and access to information in incidents.

Published

11 Jun 2026

Original amount 423,591,800,000 KRW, converted at the ECB reference rate of 10 Jun 2026.

Checked against the official source on 4 Oct 2026 · Direct link

In January 2025 attackers infected the work computer of an employee of the online job portal Incruit with malware, took over the employee’s database access and, until February 2025, extracted data on all 7,275,843 members and 54,475 stored CVs, cover letters and copies of certificates (438 GB in total). Despite conspicuous database access outside business hours, the company only noticed the leak through an extortion message; it had already been sanctioned in July 2023 for inadequate access controls. The authority imposed a penalty surcharge of 463,000,000 KRW and ordered the appointment of a qualified chief privacy officer and a plan to prevent further incidents and support those affected.

Authority / court

Personal Information Protection Commission (PIPC, 개인정보보호위원회)

Area of law

Data protection · Data breaches and data security

Legal basis

Personal Information Protection Act (개인정보 보호법) Art. 29; Sanktion nach Art. 64-2(1) Nr. 9

Action

Fine

Status of proceedings

unknown

Sector

Media and online platforms

Repeat case

yes

Mitigating circumstances

Reduction of 55% because no benefit was derived and the company is a medium-sized enterprise under the Korean Framework Act on Small and Medium Enterprises, and a further 20% for cooperation, remediation and self-regulation; increase of 65% because the infringement lasted more than two years and because of the July 2023 sanction.

Liability of senior managers

The company was ordered to appoint a new, qualified chief privacy officer (CPO) and to define the CPO’s responsibility clearly.

Published

23 Oct 2025

Original amount 463,000,000 KRW, converted at the ECB reference rate of 22 Oct 2025.

Checked against the official source on 4 Oct 2026 · Direct link

Attackers who had planted malware in systems of SK Telecom Co., Ltd. since August 2021 took 9.82 GB of data on around 23 million subscribers from the home subscriber server in April 2025, including USIM authentication keys and IMSI. The authority found a lack of network segregation and access controls, authentication data not securely encrypted, missing security updates, an inadequate set-up of the chief privacy officer function and late notification of those affected. It imposed a penalty surcharge of 134,791,000,000 KRW and an administrative fine of 9,600,000 KRW (134,800,600,000 KRW in total) and issued orders on security, governance and oversight of service providers and sales partners.

Authority / court

Personal Information Protection Commission (PIPC, 개인정보보호위원회)

Area of law

Data protection · Data breaches and data security

Legal basis

Personal Information Protection Act (개인정보 보호법) Art. 29, Art. 31(1) und (3), Art. 34(1); Sanktion nach Art. 64-2(1) Nr. 9

Action

Fine

Status of proceedings

unknown

Sector

Telecoms, IT and software

Repeat case

yes

Mitigating circumstances

Reduction of 30% because no benefit was derived and a further 50% for completed remediation, compensation of those affected and protective efforts; increase of 50% because the infringement lasted more than two years. Cooperation was not taken into account because documents were submitted late.

Liability of senior managers

There was no chief privacy officer (CPO) with overall responsibility; the company was ordered to define the CPO’s responsibility and role clearly and to rebuild its governance.

Published

28 Aug 2025

Original amount 134,800,600,000 KRW, converted at the ECB reference rate of 27 Aug 2025.

Checked against the official source on 4 Oct 2026 · Direct link

Through a port between the internal and external networks that had been opened for convenience, attackers entered the e-litigation server of the National Court Administration and took 1,014 GB of case documents; the 4.7 GB that were recovered contained data on 17,998 people, including resident registration numbers. The authority criticised unencrypted documents, unchanged, easily guessed initial passwords on administrator accounts, missing security software on one server and a report only in December 2023, although there had been indications of the leak since April 2023. It imposed a penalty surcharge of 207,000,000 KRW and an administrative fine of 6,000,000 KRW (213,000,000 KRW in total), recommended disciplinary action and improvements and is publishing the imposition of the administrative fine on its website for one year.

Authority / court

Personal Information Protection Commission (PIPC, 개인정보보호위원회)

Area of law

Data protection · Data breaches and data security

Legal basis

Personal Information Protection Act (개인정보 보호법) Art. 24(3), Art. 24-2(2), Art. 29, Art. 34(1) und (3); Sanktion nach Art. 34-2 a. F.

Action

Fine

Status of proceedings

unknown

Sector

Public sector

Culpability

negligent

Mitigating circumstances

After an increase of 20%, the amount was reduced by 25%, taking into account protective efforts such as an ISMS certification (2020–2023).

Liability of senior managers

Measures against individuals are not set out here.

Published

9 Jan 2025

Original amount 213,000,000 KRW, converted at the ECB reference rate of 8 Jan 2025.

Checked against the official source on 4 Oct 2026 · Direct link