Comcast security incident history
Hacking, data breaches and other security incidents involving Comcast, with related coverage.
Comcast vendor data breach affects 270,000 customers
270kImpact: Information of 270,000 customers
A data breach at a Comcast vendor affected 270,000 customers. Comcast agreed to pay a $1.5 million fine in the United States in connection with the incident.
Related reports: 4 · last report →Medusa ransomware gang publishes 834GB of Comcast data
Impact: 834GB of data published
The Medusa ransomware gang claimed to have attacked Comcast and stolen 834GB of sensitive data. The attackers demanded $1.2 million and then published the data. Whether Comcast confirmed the attack or how it responded has not been confirmed.
Related reports: 3 · last report →Debt collector breach exposes data of 237,000 Comcast customers
237kImpact: Personal information, including Social Security numbers, of about 237,000 customers
A breach at debt collection agency FBCS exposed the information of about 237,000 Comcast customers. The exposed information included Social Security numbers, and the attack was confirmed to be a ransomware attack.
Related reports: 7 · last report →Comcast Xfinity customer data breach puts Social Security numbers at risk
Impact: Risk of exposure of some Xfinity customers' Social Security numbers
A breach of Comcast's Xfinity customer data raised the risk that some customers' Social Security numbers had been exposed. A compensation process allowing claims of up to $10,000 was later announced under a $117.5 million settlement, with a claim deadline of 14 September 2026.
Related reports: 3 · last report →Comcast Xfinity leaks data of around 35.88 million customers
35.9mImpact: Personal data of 35,879,455 customers
At Comcast's Xfinity, the information of 35,879,455 customers was stolen through a breach of Citrix servers. The leaked information included usernames and hashed passwords, as well as some customers' contact details, dates of birth and last digits of Social Security numbers. Xfinity disclosed the incident and notified customers in December 2023, and Comcast subsequently agreed to a $117.5 million settlement.
Related reports: 35 · last report →