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Chow Sang Sang and SOGO Data Breaches Expose Member Information

Chow Sang Sang and SOGO Data Breaches Expose Member Information

First seen 13 Nov 2026, 16:43 UTC • •
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ThreatCluster AI
ThreatCluster •November 13, 2026 at 16:44 UTC
  • •Chow Sang Sang and SOGO reported unauthorized access to membership data.
  • •Potentially 820,000 members' data may have been compromised.
  • •Both companies are cooperating with investigations and enhancing security measures.

Chow Sang Sang Holdings and SOGO reported unauthorized access to their membership systems, potentially affecting up to 820,000 members. Chow Sang Sang identified the breach on November 9, 2026, while SOGO discovered abnormal data access on November 5. Both companies confirmed that personal data, including names, phone numbers, email addresses, and membership points, may have been accessed. Chow Sang Sang has engaged cybersecurity experts for investigation and has reported the incident to the Hong Kong Privacy Commissioner and police. The official website of Chow Sang Sang is currently under maintenance, and both companies are advising members to be cautious of phishing attempts. The investigation is ongoing, and further details about the extent of the data compromised are yet to be confirmed.

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Updated 1d ago How this analysis works

Timeline

2026-11-05
SOGO discovers unauthorized access
SOGO identified abnormal data reading records in its membership system, affecting potentially 820,000 members.
Thestandard.Hk
2026-11-09
Chow Sang Sang identifies security breach
Chow Sang Sang discovered unauthorized access to its systems, affecting customer and employee data.
Finance.Biggo
2026-11-12
Chow Sang Sang files disclosure
Chow Sang Sang reported the security incident to the Hong Kong Stock Exchange, revealing potential data exposure.
Finance.Biggo

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Common questions

What data may have been compromised?
Compromised data may include member names, phone numbers, email addresses, and membership points.
How many members are affected?
The incidents may affect up to 820,000 members across both Chow Sang Sang and SOGO.
What should affected members do?
Affected members should be cautious of phishing attempts and avoid sharing personal information with unknown sources.