BT Group Data Breach History
WebsiteBritish telecommunications company. BT, EE, Plusnet.
This page shows all data breaches of BT Group. View the complete breach timeline, records exposed, root causes, and AI breach risk score. BreachHistory tracks disclosed data breaches worldwide.
Data Breach Timeline — All BT Group Breaches
- 2024 2024 BT Group — Black Basta claims vs. BT Conferencing division; segregated server isolation Unknown records Share
- 2010 2010 BT — 500+ customers to ACS:Law, unencrypted 500 records Share
BT Group Data Breach Summary
This page tracks the BT Group data breach history and cybersecurity incidents affecting BT Group (United Kingdom). BreachHistory currently indexes 2 publicly disclosed or catalogued incidents spanning 2010 through 2024, with approximately 500 records reported as exposed across all indexed events. These totals may include overlapping datasets or third-party estimates and should not be interpreted as unique affected users.
The BT Group breach timeline includes major data breaches, cyber attacks, data leaks, credential exposures, API abuse, and other security incidents. Each incident provides details on the estimated records exposed, attack method, affected data types, and supporting public sources. Currently, 0 incidents are company-confirmed, while 1 remain unverified claims pending independent verification.
Largest BT Group Data Breaches
The largest indexed incidents include the 2010 BT — 500+ customers to ACS:Law, unencrypted. Record counts originating from threat actors or leak sites should be treated as estimates unless confirmed by BT Group or a regulator. Below is the list of large data breaches:
- 2010 2010 BT — 500+ customers to ACS:Law, unencrypted — about 500 records exposed · Catalogued incident
What Information Was Exposed?
Depending on the incident, exposed data may include email addresses, passwords, phone numbers, names, profile information, account identifiers, and other personal information (PII). The exact data varies between incidents, so review each breach page before assuming your information was affected.
BT Group Data Breach 2026
At the time of this update, no BT Group data breach has been catalogued for 2026. New incidents are added as official disclosures, regulatory filings, or credible cybersecurity reports become available.
What To Do If You Were Affected
If you believe your account may have been involved in a BT Group data breach, change any reused passwords, enable multi-factor authentication (MFA), monitor your account for suspicious activity, and be cautious of phishing emails or fake breach notifications.
This BT Group breach history is maintained by BreachHistory using public disclosures, regulatory filings, security research, and clearly labelled third-party claims. For the complete breach timeline, records exposed, incident details, and AI Breach Risk Score, explore the sections on this page.