TIME SINCE MOST RECENT KOREAN CYBERSECURITY FAILURE

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Recent Incidents

Previous record time without failure: 69 days
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leakhigh7/21/2026

Foreign ministry-affiliated diplomatic academy suffers cyber breach

Korea National Diplomatic Academy

South Korea’s Foreign Ministry disclosed a cyberattack on the Korea National Diplomatic Academy’s online education system that may have exposed a significant amount of data. Authorities said attackers used a previously unknown zero-day vulnerability and security weaknesses to gain access and remain inside the system for months.

#data breach#government#diplomatic academy#zero-day#foreign ministry#North Korea
leakhigh6/29/2024

Ttareungi Bike-Sharing Service Data Breach: 4 Million Users to Receive Compensation

Ttareungi

Seoul's Ttareungi bike-sharing service is giving roughly 4 million affected users a free 30-day pass to compensate for a 2024 data breach that exposed personal information for about 4.62 million accounts.

#security#breach
hackmedium7/12/2026

Yes24 confirms ransomware attack disrupting services for two days

Yes24

South Korea's major online bookstore and ticketing platform Yes24 confirmed a ransomware attack that disrupted services for two days. The breach encrypted critical data, rendering the company's website and mobile app inaccessible.

#ransomware#online bookstore#ticketing platform#service disruption
hackmedium7/14/2026

Ransomware attack on SGI Seoul Guarantee causes four-day system outage

SGI Seoul Guarantee Insurance

A ransomware attack on July 14, 2026, caused a four-day system outage at SGI Seoul Guarantee Insurance, disrupting guarantee issuance services for the company [11].

#ransomware#system outage#insurance#financial services
leakmedium7/14/2026

Exclusive: South Korean Police Detect GitHub Token Leak

GitHub (Microsoft)

South Korean police detected a data breach involving over 500 units of personal access tokens on GitHub, the world's largest open-source software development platform, raising concerns about potential infiltration of critical systems [2].

#token leak#authentication breach#software development#open source
hackhigh7/6/2026

Second IITP hack exposes South Korea's R&D data risks and security lapses

Institute of Information & Communications Technology Planning & Evaluation (IITP)

The personal information access log management system of IITP, a specialized R&D management agency under the Ministry of Science and ICT, was hacked on July 6, 2026. This incident occurred just seven months after a previous hacking incident at the same agency.

#government#R&D#data breach#personal information#Ministry of Science and ICT