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Eversource Data Breach Exposes Personal Information of 2,592 Customers

Eversource Data Breach Exposes Personal Information of 2,592 Customers

First seen 13 Nov 2026, 23:47 UTC • •
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ThreatCluster AI
ThreatCluster •November 13, 2026 at 23:48 UTC
  • •Eversource's data breach exposed sensitive information of 2,592 customers.
  • •The breach went undetected for nearly two weeks, delaying customer notifications.
  • •The OCC is demanding an independent audit of Eversource's cybersecurity practices.

On April 14, 2026, Eversource Energy suffered a data breach that exposed sensitive personal and financial information of 2,592 Connecticut ratepayers. The breach involved unauthorized access to over 3.6 million files, with Eversource reportedly unaware of the breach for nearly two weeks. The Office of Consumer Counsel (OCC) criticized Eversource for its delayed response, stating that customers were not notified until a month after the breach was discovered. The OCC is now calling for an independent audit of Eversource's cybersecurity practices at the expense of shareholders. The breach affected customers in the financial hardship program, with compromised data including Social Security numbers and bank statements. Eversource's failure to promptly inform affected customers and employees has raised significant concerns about its cybersecurity protocols.

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Timeline

2026-04-14
Eversource data breach occurs
Unauthorized access to Eversource systems begins, exposing sensitive customer data.
Portal.Ct
2026-04-27
Eversource learns of the breach
Eversource is alerted to the data breach by a third party, but unauthorized access continues.
Nbcconnecticut
2026-05-14
Customers notified of the breach
Eversource sends out notifications to affected customers, a month after the breach was discovered.
Nbcconnecticut
2026-11-13
OCC calls for independent audit
Consumer Counsel Coleman urges for an independent audit of Eversource's cybersecurity practices.
Portal.Ct

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Extracted Entities (8)

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Common questions

What type of data was compromised?
The breach exposed sensitive personal information, including Social Security numbers, bank statements, and tax returns.
How long did Eversource take to notify customers?
Eversource took nearly a month to notify customers after discovering the breach.
What actions is the OCC taking?
The OCC is calling for an independent audit of Eversource's cybersecurity practices at the expense of shareholders.