Tens of millions of people are being warned about a major data breach at the US fintech firm Prosper.
According to the cybersecurity and data aggregating website haveibeenpwned.com, the personal data of 17.6 million customers of Prosper has been breached, including names, social security numbers, credit records, home and IP addresses, as well as other information.
“In September 2025, Prosper announced that it had detected unauthorized access to their systems, which resulted in the exposure of customer and applicant information. The data breach impacted 17.6 million unique email addresses, along with other customer information, including US Social Security numbers.”
In its incident report, Prosper says it did not find any evidence that customer funds have been accessed or stolen and no incidents have taken place since September 2nd. The firm says an internal investigation is underway and it has informed authorities of the matter.
“There is no evidence of unauthorized access to customer accounts and funds, and our customer-facing operations continue uninterrupted.
We have evidence that confidential, proprietary, and personal information, including Social Security Numbers, was obtained, including through unauthorized queries made on Company databases that store customer information and applicant data…
We have no indications of any unauthorized activity since September 2. We have enhanced monitoring of our systems and are actively pursuing the investigation, which is in its early stages. We will take further actions as the findings warrant. We also reported the incident to law enforcement and have offered our full cooperation.”
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