LAWSON said on 8 October that its LAWSON ID account service and LAWSON App reservation service had been accessed by a third party and that some customer personal data had leaked; a 7 October review found the LAWSON ID access occurred from 12 to 14 September and the reservation-service access on 17 September, and it said it had not found other intrusions or malware [1]. LAWSON ID covers 2,155,345 records; the page lists names, dates of birth, sex, phone numbers and addresses, and a 24 October update said email addresses and newsletter-preference data had not leaked, while dates of birth may have. LAWSON App reservation covers 26 records, including names, phone numbers and part of a credit-card number. The company said it had blocked suspicious sources, temporarily halted reservations (later resumed) and reported the matter to the Personal Information Protection Commission [1]. It asked people to be careful with unexpected emails, SMS or calls to addresses registered on an affected LAWSON ID, and to contact the official customer-service form if they have questions [1].
LAWSON ID breach affects 2,155,345 records; official notice warns of unexpected messages
1 min read
- Disclosed
- Oct 8, 2026
- Occurred
- Sep 12, 2026
- Published
- Nov 12, 2026
- Last updated
- Nov 12, 2026
- Scale
- 2,155,345 records[1]
- CVSS basis
- Our assessment
- Attack vector
- Impact
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Retail
What to do nowOur advice
- Be careful with unexpected emails, SMS or calls sent to contacts registered on an affected LAWSON ID .
Timeline
Technical details
Remediation
Vendor guidance
- 1Treat unexpected messages to your registered LAWSON ID contacts with caution mitigate[1]
Be careful with unexpected email, SMS or calls to contacts registered on an affected LAWSON ID, and use the official customer-service form if you have questions.
References
Official / primary1
- [1]株式会社ローソン2026-10-08Accessed 2026-11-12Snapshot 2026-11-12 sha256 6490f137c0f9
“本件で対象となっているローソン ID にご登録いただいた宛先への不審なメール、 SMS 、電話等には十分ご注意ください”
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