# South Korean data breach and security response > Live situation record from CLSTR: https://clstr.news/situations/south-korean-data-breach-and-security-response > Updated: 2026-09-28T06:27:36.000Z. Sources: 3. Developments: 2. Following a major data breach involving approximately 39.54 million accounts, South Korean lawmakers initiated parliamentary audits to investigate security failures. The National Assembly's Science, ICT, Broadcasting, and Communications Committee summoned executives from TVING and CJ ENM, citing unaddressed vulnerabilities such as exposed access keys. Chief Information Security Officers from major telecommunications providers SK Telecom, KT, and LG Uplus were also called to testify regarding their incident response protocols. In response to these incidents, the Personal Information Protection Commission met with the CEOs of SK Telecom, KT, and LG Uplus. The telecommunications companies signed a joint declaration to implement a proactive responsibility governance system. To bolster security, the companies announced significant long-term investments: SK Telecom pledged 700 billion won over five years, while KT committed 2.2 trillion won toward security and IT infrastructure modernization. LG Uplus pledged to strengthen its preemptive prevention systems to manage data risks in the era of AI. ## Timeline ### 2026-09-28: South Korean telecom CEOs pledge massive security investments South Korea's top three telecom providers pledged massive investments in data security and shifted privacy responsibility to their CEOs following recent breaches and the rise of AI. 2 sources. https://clstr.news/cluster/south-korean-telecom-ceos-pledge-massive-security-investments ### 2026-09-22: South Korean lawmakers summon TVING and CJ ENM executives over data leaks South Korean lawmakers have summoned executives from TVING, CJ ENM, and major telecom providers to testify at parliamentary audits regarding massive personal data breaches and security management failures. 2 sources. https://clstr.news/cluster/south-korean-lawmakers-summon-tving-and-cj-enm-executives-over-data-leaks --- Cite as: South Korean data breach and security response. CLSTR, https://clstr.news/situations/south-korean-data-breach-and-security-response