Hanyang Securities
Seoul, South Korea3 sources
Confirmed:Confirmed by the organisation, a regulator or a securities filing. First reported 29 Oct 2026.
Hanyang Securities confirms data leak via external groupware
Hanyang Securities reported a data leak via an external groupware solution affecting 15 customer cases, two employee cases and 14 general personal-information cases, including names, resident registration numbers, driver's licence numbers, account numbers and contacts. The company confirmed the breach on 29 October.
- Type
- Data breach
- Sector
- Finance
- Records
- 31 records confirmed
- First reported
- 29 Oct 2026
- Latest source
- 3 Nov 2026
What to do
- If you have an account, change that password, and anywhere you reused it.
- Turn on two-factor authentication, ideally an authenticator app or passkey, not SMS.
- Expect phishing that uses your real details. Do not click links in messages about this incident; go to the company's site directly.
- If payment cards were involved, watch statements and ask your bank for a new card.
- If government ID or social security numbers were involved, consider a credit freeze.
- If this is a vendor of yours, ask what of your data they held and whether it was in scope.
- Reset any API keys, SSO trusts or shared credentials you have with them.
- Brief your help desk: attackers often impersonate the breached brand next.
Not sure? Ask an assistant with the sources attached, or have a coding agent check your systems.
Check your systems for Hanyang Securities
Sources
3- en.sedaily.com3 Nov 2026en.sedaily.com/finance/2026/11/03/hanyang-securities-hit-by-hacking-leaking-customer-and
- biz.chosun.com3 Nov 2026biz.chosun.com/en/en-finance/2026/11/03/JOZRA2PCJFAPLG5RT3QYUYXNQQ
- en.sedaily.com29 Oct 2026en.sedaily.com/finance/2026/11/03/security-stocks-jump-as-hacking-hits-brokerages-hanssak