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Japan on Line Breach: Clean Up Post-Merger Tech Sprawl

ID: 40709fd5-b8c4-5d56-aed3-e8eeaca36a45

STIX ID: report--40709fd5-b8c4-5d56-aed3-e8eeaca36a45

Feed Name: Dark Reading

Threat Score
60/100

Date Published: 2024-03-06

Date Updated: 2026-04-21

Author: Dark Reading Staff

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The Japanese government reviewed a November 2023 data breach at messaging app Line that exposed over 510,000 users and concluded that the company's merged technology footprint with parent Naver (including a shared Active Directory and broad cloud access) created a sprawling attack surface; regulators instructed LY Corp to decouple Line's technology from Naver, conduct cybersecurity reviews, and provide regular progress updates.

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