Insight Partners, a U.S.-based venture capital firm, has acknowledged a security breach that occurred in January, resulting in unauthorized access to its systems.

Following an inquiry from TechCrunch, Insight Partners released a statement on Tuesday, confirming the incident. Earlier in the day, Calcalist had initially reported the breach.

According to Insight Partners’ statement, the company detected an “unauthorized third party” that had gained access to “certain Insight information systems” through a sophisticated social engineering attack on January 16. However, the company did not provide specifics about the nature of the social engineering attack.

The company stated that it promptly responded to the incident, taking swift action to “contain, remediate, and initiate an investigation” within a matter of hours after detection.

With over $90 billion in assets under management and investments in several cybersecurity companies, including Armis and Wiz, Insight Partners has notified its stakeholders about the breach. The company has a significant presence in the industry, making the breach a notable incident.

Although Insight Partners has not disclosed the specifics of the security incident or confirmed whether any data was stolen, the company is advising its partners to implement “tightened security protocols,” implying that data may have been compromised.

When approached by TechCrunch for further information, Insight Partners spokesperson Natalie Sawyer declined to answer questions, including those related to potential disruptions to the company’s business operations.

In its published statement, Insight Partners expressed confidence that it does not anticipate any “additional disruption” to its operations as a result of the incident.