Dueling Network 2017 Data Breach

Dueling Network 2017 Data Breach

Gaming / Video Games

Dueling Network 2017 Data Breach

A browser-based yu-gi-oh! online dueling game/community.

Confirmed · ObscureIQ Intelligence
Breach Risk Index i
17/100
Lower riskHigher risk
Lower: limited current risk based on data value and recency.
Data Sensitivity i
Standard
Exposed data is largely lower-sensitivity. Standard identity-protection precautions are advised.
6.5MRecords
2017Year

The Breach Risk Index (BRI) is a proprietary 0–100 score rating how dangerous a breach is right now, based on how recently the data has been circulating on the dark web and how valuable it is to attackers.

Classification Tags
Web Application ExploitGamingVideo GamesUsers2017

Breach Summary

In 2017, Dueling Network (a browser-based Yu-Gi-Oh! online dueling game/community) suffered a data breach exposing about 6,484,953 accounts, limited to account credentials: email addresses and passwords, with usernames and IP addresses.

Full threat analysis, exploitation vectors, and principal guidance below.

10 additional sections · verified field analysis · defensive doctrine

Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…

6.5M records analyzed

About Dueling Network

Dueling Network is a browser-based Yu-Gi-Oh! online dueling game/community.

Why They Hold Your Data

A site of this kind holds member account credentials (email addresses, usernames and passwords) and limited profile data.

Recent Developments

The Dueling Network account data circulated after the breach; credentials of this age carry ongoing reuse risk.

Data Points Exposed

4 verified field types
Email Address
IP Address
Password High
Username

Breach Impact

The breach exposed account credentials for Dueling Network users; impact is concentrated in account-takeover and password-reuse risk rather than identity or financial exposure.

Exploitation & Downstream Threats

• Credential stuffing against reused passwords across other platforms | • Targeted phishing campaigns using exposed email addresses

Principal Risk Advisory

What this means for a principal

A consumer-service breach: contact and account data supports phishing, account takeover and profile enrichment. For a high-profile principal the main risk is credible impersonation and enrichment of existing exposure.

What You Should Do

  1. Reset any reused passwords and enable MFA on email first, then financial accounts.
  2. Do not use unofficial 'am I affected' lookups; several are themselves harvesting operations.

How ObscureIQ Can Help

  1. Corpus confirmation: determine whether and where the principal (plus household and staff) appear in this dataset and which specific fields are exposed for them.
  2. Exposure mapping: cross-reference the exposed identifiers against broker-available data to size and prioritize the principal's wider footprint.
  3. ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).

Protect Yourself

Check If You're Affected

Enter your email to check whether your data appears in this breach. We’ll send a 6-digit code to confirm it’s your address.

High-Risk? Get an Exposure Audit

Executives, public figures, and high-visibility operators can receive tailored exposure intelligence and hardening guidance.

Request Consultation