In an exchange filing, HCLTech said its initial investigation found the data "may be limited and dated to a few years back." The company said there was no evidence of a breach of its systems, and no indication that any client engagement was affected.

Tata Consultancy Services (TCS) reported receiving alerts about potential exposure of employee-related data, while confirming no compromise to customer data or systems.

In an exchange filing, HCLTech said its initial investigation found the data "may be limited and dated to a few years back." The company said there was no evidence of a breach of…