Skip to content
Data Leak at South Korea's Financial Security Institute Following Cyberattack

Data Leak at South Korea's Financial Security Institute Following Cyberattack

First seen 11 Nov 2026, 00:19 UTC • •
API

Article Content

Browse articles
ThreatCluster AI
ThreatCluster •November 11, 2026 at 00:20 UTC
  • •FSI reported a data leak due to a cyberattack on November 10, 2026.
  • •Approximately 200 administrative forms and 300 personal data entries were leaked.
  • •The attack involved changing IP addresses to mask unauthorized access.

On November 10, 2026, South Korea's Financial Security Institute (FSI) reported a data leak due to a hacking attack targeting its security assessment system. The breach was detected at 3 p.m. on November 7, prompting immediate action to block the affected system. The leaked data includes approximately 200 administrative forms, around 300 pieces of personal data such as names and birthdates, and about 350 user-related information entries. The attack involved a method where the hacker frequently changed IP addresses to disguise unauthorized access. The FSI has informed the Financial Services Commission and the Korea Internet & Security Agency (KISA) about the incident. The full extent of the compromised information related to the security status submitted by financial firms is still under investigation.

Start a free Starter trial for enhanced analysis

Ask AI about this cluster

Updated 12h ago How this analysis works

Timeline

2026-11-07
Breach detected
FSI detected unauthorized access at 3 p.m. and blocked the affected system.
En.Yna.Co.Kr
2026-11-10
Data leak reported
FSI publicly disclosed the data leak and informed relevant authorities.
Databreaches

More articles in this cluster (3)

Following this threat?

Track Financial Security Institute in your own feed — you're alerted when they show up in new reporting, leak sites or exploitation.

Free account · no card needed

Extracted Entities (5)

1 / 3

Common questions

What data was leaked?
The leak involved around 200 administrative forms and approximately 300 pieces of personal data.
How was the breach executed?
The attacker used a method of frequently changing IP addresses to appear as legitimate access.
What actions have been taken since the breach?
The FSI blocked the affected system and reported the incident to relevant authorities.