Vanni & Humphrey CPA Data Breach Investigation
The data breach lawyers at The Lyon Firm are investigating a recent data security incident at the California accounting firm Vanni & Humphrey. The company has alerted the Attorney general of California and has sent a sample data breach notification letter that all impacted individuals should receive in the mail.
If you have been contacted by the CPAs regarding a potential data theft it is important to know the risks of fraud and identity theft following cyberattacks that leak large amounts of personal data. As accountants that handle tax returns and other personal and business finances, it is likely that they had stores sensitive, valuable information.
Call our legal team to learn more about ongoing class action data breach litigation and to consider filing a complaint to seek compensation and accountability. We have filed dozens of data breach lawsuits and we represent clients in all fifty states.
What Happened At Vanni & Humphrey?
Vanni & Humphrey has reported that it experienced a data breach in which sensitive personal identifiable information in its possession may have been compromised. According to the available breach notice, in March 2025, the company detected an incident in which an unauthorized third party gained access to their network and acquired documents from its SmartVault client portal.
An investigation confirmed that some personal information, including tax documents belonging to clients, may have been viewed and stolen by an unauthorized third party. The type of information could potentially include the following:
- Name
- Social Security number
- Address
- Driver’s license number
- Financial account information
On April 15, 2024, Vanni & Humphrey started mailing data breach notification letters to impacted individuals. The CPAs offer services to non-profit organizations and businesses, as well as individuals such as school teachers, police officers, construction workers, doctors, lawyers, and any other profession that requires insightful tax preparation services. They offer tax return services to partnerships, corporations, estates and trusts as well as simple or complicated personal tax returns.