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WilmerHale Faces Lawsuit Over Data Breach Exposing Client Information

WilmerHale Faces Lawsuit Over Data Breach Exposing Client Information

First seen 15 Jul 2026, 20:48 UTC • •

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ThreatCluster AI
ThreatCluster •July 16, 2026 at 20:34 UTC
  • •WilmerHale is sued for a May 2026 data breach affecting client personal information.
  • •The lawsuit claims negligence in safeguarding sensitive data, including social security numbers.
  • •The firm reported the breach was isolated and did not involve direct access to their systems.

WilmerHale, a major American law firm, is being sued following a data breach that allegedly exposed sensitive personal information of clients and employees. The lawsuit, filed by Jason Perry in the U.S. District Court for the District of Columbia, claims the firm failed to adequately protect client data, including social security numbers. The breach, which occurred in May 2026, was reportedly isolated, with no direct access to the firm's systems by the unauthorized third party. Clients were notified of the breach on July 10, 2026. The suit seeks unspecified monetary damages and improved security measures. WilmerHale has stated that the incident was quickly contained and that they are enhancing security protocols. This incident reflects a growing trend of cyberattacks targeting law firms, which hold vast amounts of sensitive data.

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Timeline

2026-05-01
Data breach occurred
WilmerHale's network was breached by an unauthorized third party targeting law firms.
Mezha
2026-07-10
Clients notified of breach
WilmerHale informed clients that their personal information may have been compromised.
News.Bloomberglaw
2026-07-14
Lawsuit filed
Jason Perry filed a class action lawsuit against WilmerHale for negligence regarding the data breach.
News.Bloomberglaw
2026-07-15
Lawsuit reported
Media outlets reported on the lawsuit and the implications for WilmerHale's cybersecurity practices.
Mezha

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