kaidown.com

The investigation team has indexed a credential leak tied to kaidown.com, a listing containing 860,808 records that each pair an email address with a password. The team estimates the breach date as January 1, 2020, though the exact circumstances of the compromise remain unclear. No hacking group or individual has claimed responsibility for the leak, and the team added the listing to its database on December 1, 2024.

Secondary reporting adds some context but also introduces uncertainty. HEROIC, a threat intelligence company, published an analysis of the kaidown.com data in July 2025 describing it as a database breach of a Thai general business website that exposed roughly 858,000 user records, including passwords stored in plaintext, meaning they were not encrypted or hashed. The differing counts and dates suggest the circulating dataset may have been recirculated or recombined over time, a common pattern with older credential dumps.

Limited public reporting: As of September 25, 2026, detailed company notices or major news coverage for this listing were limited in sources reviewed. The facts below rely primarily on the indexed fields plus any secondary sources cited.

What Information Was Compromised?

Our analysis found the following data types in this breach:

Email addresses: 860,808

Passwords: 860,808

Not every individual is affected by every type of data listed here.

What Are the Potential Risks for Affected Individuals?

Email and password pairs are the raw material for credential stuffing attacks. Criminals feed stolen pairs into automated tools that test them against Gmail, banking sites, shopping accounts, and other popular services. Any account where a person reused the same password as on kaidown.com is at direct risk of takeover.

If the passwords were indeed stored in plaintext, that raises the risk further, because there is no decryption step required before the credentials can be used. Old credential lists like this one also circulate for years on dark web forums and get folded into larger compilation lists, so exposure does not fade with time.

What Should You Do If You Were Affected?

Change your password on kaidown.com if you still have an account there, and change it anywhere else you reused the same password.

Use a unique, strong password for every account. A password manager makes this practical.

Turn on two-factor authentication wherever it is offered, especially for email and financial accounts, since email access lets attackers reset other passwords.

Watch for phishing. Criminals who hold your email address can craft convincing messages, so treat unexpected login alerts or password reset emails with caution.

Review login activity on your important accounts for unfamiliar sessions or devices.