On or about July 9, 2025, WCIRB detected a network security incident involving unauthorized access to a third-party system, Box.com. The breach occurred when an unauthorized entity accessed WCIRB’s environment and acquired certain individual personal information. Data mining efforts concluded on September 18, 2025. Further address verification was completed on October 7, 2025. Although WCIRB reports no evidence of misuse, the exposure of sensitive data constitutes a serious privacy risk.
WCIRB is a licensed rating organization that provides actuarial data and research related to California’s workers’ compensation insurance system. It serves as a central resource for data and information used by insurers, employers, and regulators.
WCIRB sent data breach notification letters to affected individuals and offered complimentary identity protection services through IDX. If you received a Data Breach notification letter from WCIRB, it confirms that your information was potentially impacted.
What information is involved in the WCIRB Data Breach?
Compromised information may include:
First and Last Name
Other Personal Data Elements Associated with Workers’ Compensation Records
Your Personally Identifiable Information (PII) includes details that can be used to identify you. Organizations are legally obligated to safeguard this data, and failure to do so can result in statutory fines and other legal consequences. If PII is stolen, it may be exploited by criminals to commit identity fraud.
A specific category of PII is Protected Health Information (PHI), which pertains to personal medical data. PHI is safeguarded under both federal and state regulations. Entities such as healthcare providers and businesses that manage PHI must ensure its security. Just like PII, compromised PHI can be misused by identity thieves, and it’s common for cybercriminals to use both types of information together.
If your data has been exposed in a breach, one of the most effective steps you can take is to enroll in credit and identity monitoring services promptly.
Residents of California benefit from additional privacy protections under the California Consumer Privacy Act (CCPA), which grants enhanced rights regarding personal data.
If you received a NOTICE OF DATA BREACH letter from WCIRB, your personal, financial, and/or medical information may be at risk. This type of data can be exploited by identity thieves to commit fraud and other crimes.