So-net Data Breach Reaches Members Who Canceled After March
Sony Network Communications said on November 6 that unauthorized access to the So-net member database exposed personal data. Current members and former members who canceled after March 2026 are affected.
1 source 18h ago
Reporting from 1 source: ASCII.jp.
Why it matters
The breach follows canceled accounts after March 2026, so the exposure extends past the current membership list and reaches people who already left So-net.
Key Facts
- Sony Network Communications announced the So-net member database breach on November 6.
- Unauthorized access occurred on October 19 and was confirmed on October 23.
- Former members who canceled after March 2026 are among those affected.
- Leaked items include names, phone numbers, user IDs, connection IDs, and So-net basic email addresses.
- The company says no unauthorized use or secondary damage has been confirmed.
Leaked items include names, phone numbers, user IDs, connection IDs, and So-net basic email addresses, plus dates of birth, gender, and contact email addresses where users registered them. The access happened on October 19 and was confirmed on October 23.
The access was detected on October 19 and confirmed four days later. Sony Network Communications shut down the affected servers to cut communication with the attack source, then determined in an October 24 investigation that information had leaked and identified the affected items and record count.
The company says it has confirmed no unauthorized use of the information or secondary damage so far. It is asking users to watch for suspicious messages that impersonate So-net or the user's own email address. The leaked set also includes the address on record for members whose basic email use had ended.
Written with AI by Yomimono from the 1 cited source below, including Japanese-language reporting where cited. See our editorial policy.
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