Other

livedoor ID

livedoor ID (run by LY Corporation) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2020-05-24.

About the service

Website

https://www.livedoor.com/

Run by

LY Corporationsince 2023-10-01

Formerly run by

Z Intermediate Global Corporation2021-03-01 to 2023-10-01
A Holdings Corporationuntil 2021-03-01

Category

Other

For

People

Incident history

Disclosed 2020-05-24Updated 2020-05-27 09:00Tokyo[Resolved][Severity: Major][Breached][Major]
LINE: a mass login attempt on livedoor ID got into some accounts
[Credential abuse]Organizations 1

		Incident	Role	Impact level				Methods	Impacts		Status
2020-05-24	2020-05-27 09:00	LINE: a mass login attempt on livedoor ID got into some accounts	[Breached]	[Major]	[Major]	1 A Holdings Corporation	Tokyo	[Credential abuse]		Unknown	[Resolved]

Other incidents of the operator (10)

Disclosed 2026-10-09Updated 2026-10-26 18:29Aomori, Hiroshima, Osaka, Shizuoka, Tokyo[Investigating][Severity: Critical]
Commune: unauthorized access to the Commune community platform
[Intrusion][Data leak]Leaked 307KOrganizations 12
Disclosed 2024-11-29Updated 2024-12-12 16:21Tokyo[Resolved][Severity: Critical]
LY Corp: a LINE Album defect showed thumbnails of other users' album images, affecting over 120,000 users in Japan
[Misconfiguration][Data leak]Organizations 1
Disclosed 2024-08-26Updated 2024-09-03 08:05Tokyo[Resolved][Severity: Major]
LY Corp: credential stuffing on LINE Business IDs hijacked 688 official accounts, exposing friends' chats and other data
[Credential abuse][Data leak][Fraud]Organizations 1
Disclosed 2024-08-05Updated 2024-08-14 08:05Tokyo[Resolved][Severity: Major]
LY Corp: a defect in Yahoo! JAPAN ID SMS login may have let third parties read Yahoo! Mail
[Misconfiguration][Data leak]Organizations 1
Disclosed 2024-02-14Updated 2026-10-23Tokyo[Contained][Severity: Major]
LY Corporation: contractor accounts misused; 57,611 staff-related records may have leaked
[Credential abuse][Data leak]Leaked 57.6KOrganizations 1
Disclosed 2023-11-27Updated 2024-04-23 08:05Tokyo[Contained][Severity: Critical]
LY Corporation: contractor PC malware led to access to former LINE systems, and up to about 520,000 records leaked
[Malware][Intrusion][Data leak]Leaked 519.5KOrganizations 1
Disclosed 2021-02-09Updated 2021-02-15 08:00Tokyo[Resolved][Severity: Major]
LINE: a password list attack hit the login page of its inquiry form, and phone numbers, user identifiers and mail addresses could be obtained for 3,035 accounts
[Credential abuse][Data leak]Leaked 3KOrganizations 1
Disclosed 2020-12-03Updated 2020-12-08 08:00Tokyo[Resolved][Severity: Moderate]
LINE: double-stuck address labels on membership gifts for Disney x LINE exposed the names and addresses of 2,608 customers to other customers
[Misdelivery][Data leak]Leaked 2.6KOrganizations 1
Disclosed 2020-09-17Updated 2020-09-17 05:36Tokyo[Resolved][Severity: Major]
LINE: a password list attack on LINE Login confirmed that about 74,000 IDs and passwords were valid
[Credential abuse][Data leak]Leaked 74KOrganizations 1
Disclosed 2020-02-26Updated 2020-03-01 19:30Tokyo[Investigating][Severity: Major]
LINE: 4,225 accounts logged into by others and used to post spam and phishing links
[Credential abuse][Phishing]Leaked 4.2KOrganizations 1

		Incident				Methods	Impacts		Status
2026-10-09	2026-10-26 18:29	Commune: unauthorized access to the Commune community platform	[Critical]	12 Commune Inc., Aomori Prefectural Government, LY Corporation, Mazda Motor Corporation, Panasonic Corporation, Suzuki Motor Corporation, Yamaha Motor Co., Ltd., Bandai Namco Experience Inc., Koike-ya Inc., Morinaga Milk Industry Co., Ltd., Sansan, Inc., Yamaha Corporation	Aomori, Hiroshima, Osaka, Shizuoka, Tokyo	[Intrusion]	[Data leak]	307,000	[Investigating]
2024-11-29	2024-12-12 16:21	LY Corp: a LINE Album defect showed thumbnails of other users' album images, affecting over 120,000 users in Japan	[Critical]	1 LY Corporation	Tokyo	[Misconfiguration]	[Data leak]	Unknown	[Resolved]
2024-08-26	2024-09-03 08:05	LY Corp: credential stuffing on LINE Business IDs hijacked 688 official accounts, exposing friends' chats and other data	[Major]	1 LY Corporation	Tokyo	[Credential abuse]	[Data leak][Fraud]	Unknown	[Resolved]
2024-08-05	2024-08-14 08:05	LY Corp: a defect in Yahoo! JAPAN ID SMS login may have let third parties read Yahoo! Mail	[Major]	1 LY Corporation	Tokyo	[Misconfiguration]	[Data leak]	Unknown	[Resolved]
2024-02-14	2026-10-23	LY Corporation: contractor accounts misused; 57,611 staff-related records may have leaked	[Major]	1 LY Corporation	Tokyo	[Credential abuse]	[Data leak]	57,611	[Contained]
2023-11-27	2024-04-23 08:05	LY Corporation: contractor PC malware led to access to former LINE systems, and up to about 520,000 records leaked	[Critical]	1 LY Corporation	Tokyo	[Malware][Intrusion]	[Data leak]	519,506	[Contained]
2021-02-09	2021-02-15 08:00	LINE: a password list attack hit the login page of its inquiry form, and phone numbers, user identifiers and mail addresses could be obtained for 3,035 accounts	[Major]	1 A Holdings Corporation	Tokyo	[Credential abuse]	[Data leak]	3,035	[Resolved]
2020-12-03	2020-12-08 08:00	LINE: double-stuck address labels on membership gifts for Disney x LINE exposed the names and addresses of 2,608 customers to other customers	[Moderate]	1 A Holdings Corporation	Tokyo	[Misdelivery]	[Data leak]	2,608	[Resolved]
2020-09-17	2020-09-17 05:36	LINE: a password list attack on LINE Login confirmed that about 74,000 IDs and passwords were valid	[Major]	1 A Holdings Corporation	Tokyo	[Credential abuse]	[Data leak]	73,978	[Resolved]
2020-02-26	2020-03-01 19:30	LINE: 4,225 accounts logged into by others and used to post spam and phishing links	[Major]	1 A Holdings Corporation	Tokyo	[Credential abuse][Phishing]		4,225	[Investigating]