finance.biggo reported a data breach at Iwai Cosmo Securities (Japan) on 20 October 2026, and it has been confirmed. It affected 4,975 people. Exposed: Names.
Status
Confirmed breach
People affected
4,975 people
Reported
20 October 2026
What was exposed
Names
How it happened
How
Hacking unauthorized access to an outside contractorsource
Way in
outside contractor unauthorized access to an outside contractor, and it stated that the leaked information was not used in the fraudulent tradessource
Look for Iwai Cosmo Securities’s own notice or letter: it should say what of yours was involved. Keep it.
Expect scams that use your details: calls, texts or emails pretending to be Iwai Cosmo Securities, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.
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