Bithumb Sistema interno de groupware móvel da… · Breach

Bithumb confirms leak after unauthorized access to internal groupware

Oct 28, 2026 · 1 min read

Cryptocurrency exchange Bithumb confirmed a personal information leak after unauthorized access to its internal mobile groupware system, according to a post on X. The exchange is investigating whether customer information was exposed. No software fix is involved; the incident follows other security events in the South Korean financial sector, including a data leak affecting 38,490 Daishin Securities customers.

By HIFY Radar newsroom Updated 10/28/2026 10:21 AM Get this every day →← Back to the feed 1 source

MediumBreachNo software to update

In this article

What happened
Why it matters
What to do
For the technical team
Timeline
Sources

What happened

Bithumb, a South Korean cryptocurrency exchange, confirmed a personal information leak after unauthorized access to its internal mobile groupware system, according to a post on X. The exchange is investigating whether customer information was exposed. No software fix is involved.

Why it matters

If customer data exposure is confirmed, exchange users could face misuse of their personal information. The incident adds to other security events in the South Korean financial sector, which may affect trust among customers and partners.

What to do

Follow Bithumb's official statements and the outcome of the investigation into customer data. Companies running internal groupware should review access controls on those systems.

For the technical team

Affected: Bithumb Sistema interno de groupware móvel da Bithumb, exchange de criptomoedas da Coreia do Sul · Bithumb's internal mobile groupware system. No versions cited in the sources.
Exploitation: Personal information leak confirmed by Bithumb, per a post on X by @Cryptic_Web3 citing @BithumbOfficial. Scale of the access and further exploitation not reported. No KEV or PoC mentioned.
Fix: No fix cited. The incident is handled as a data breach, not as a software flaw with a patch.
Vector: Unauthorized access to Bithumb's internal mobile groupware system. Initial vector and conditions of the intrusion are not detailed in the sources.
More details: Bithumb is investigating whether customer information was exposed. According to the source, the incident follows a data leak affecting 38,490 Daishin Securities customers and a separate security breach at Mirae Asset Global Investments.