Kebocoran Data Kripto Menimpa Vendor Coinbase dan Bithumb: Cara Pengguna Melindungi Akun Mereka

Coinpedia Fintech News · 2026-10-28T08:39:37.000Z

Kebocoran data kripto kembali menjadi sorotan setelah dilaporkan terjadi empat insiden yang melibatkan platform mata uang kripto dan perusahaan keuangan Korea Selatan. Menurut unggahan CZ di X, Amplitude, vendor Coinbase, mengekspos informasi kontak sejumlah pengguna, sementara bursa Korea Selatan Bithumb juga mengalami kebocoran data pengguna. Dua perusahaan sekuritas konvensional, Mirae Asset dan Daishin Securities, juga dilaporkan terdampak. Insiden-insiden ini menyoroti kenyataan yang meresahkan: melindungi dana pelanggan saja tidak cukup ketika informasi pribadi jatuh ke tangan yang salah.

Crypto data leaks are back in the spotlight after four reported incidents involving cryptocurrency platforms and South Korean financial firms. According to an X post by CZ, Coinbase vendor Amplitude exposed some users’ contact information, while South Korean exchange Bithumb also experienced a user data leak. Two traditional securities firms, Mirae Asset and Daishin Securities, were also reportedly affected.
The incidents highlight an uncomfortable reality: protecting customer funds isn’t enough when personal information falls into the wrong hands.
Four Reported Data Leaks Raise Security Concerns
The reported incidents involve both cryptocurrency services and traditional finance. Although the Coinbase vendor incident reportedly exposed contact data, funds were said to be unaffected. 
Still, leaked names, email addresses, phone numbers, home addresses, identification documents, and transaction histories can create serious risks. Criminals may use this information for phishing, SIM swapping, and social engineering. In some cases, exposed personal details and information about holdings can also increase the risk of real-world extortion.
4 data leaks reported today:

1. Coinbase's vendor Amplitude exposed some users’ contact data (funds unaffected).
2. Bithumb (Korea) had user data leaks.

In TradFi, two securities firms in Korea leaked data: 
3. Mirae Asset
4. Daishin Securities

You can't prevent a leak, but…
— CZ 🔶 BNB (@cz_binance) October 28, 2026
Lock Down Your Crypto Accounts Before Trouble
Start with the basics. Use a unique email alias for each exchange, avoid sharing unnecessary profile details, and consider a dedicated phone number for financial accounts.
A password manager can generate strong, unique passwords. For stronger authentication, use hardware security keys, passkeys, or an authenticator app instead of SMS-based two-factor authentication.
Where available, enable withdrawal address whitelisting, withdrawal time locks, and anti-phishing codes. Regularly review active sessions and API keys, delete unused keys, and restrict necessary API access by IP address.
What Crypto Users Should Do After Breaches
Never trust unsolicited messages claiming to offer account recovery or urgent security assistance. Legitimate exchange support staff won’t ask for passwords, authentication codes, or seed phrases. Visit exchange websites directly instead of clicking email or text links.
If a breach is announced, change affected passwords, revoke suspicious sessions and API keys, review withdrawals, and check whether your email appears on Have I Been Pwned.
Crypto data leaks don’t automatically mean funds are compromised. But stronger account security and less exposed personal information can make life considerably harder for attackers.