Class Action U Logo
Check Your Eligibility

Cytek Biosciences Data Breach

Cytek Biosciences, Inc. recently experienced a data security incident involving unauthorized access to its systems, compromising the personal information of individuals. The breach, which occurred around November 1, 2025, exposed sensitive data such as Social Security numbers, health information, and other personal details. Cytek is offering resources to help individuals protect themselves, but those impacted may also be eligible for compensation through a class action lawsuit.

Cytek Biosciences
Date of Breach: November 1, 2025
CAU logo

Who was affected:

Clients of Cytek Biosciences

Impacted Data:

Name

Contact Information

Date of Birth

Social Security Number

Driver’s License Number

Government-Issued ID Number

Citizenship Status

Signature

Health and Medical Information

Financial Account and Compensation Information

Cytek Employee Account Username and Password

Check Your Eligibility

On or around November 1, 2025, Cytek Biosciences detected unauthorized access to certain systems within its infrastructure. Following the discovery of the breach, Cytek took immediate action to contain and mitigate the situation, including taking affected systems offline. Third-party forensic investigators were brought in to assist with the investigation and determine the scope of the breach.

By November 28, 2025, Cytek confirmed that an unauthorized party had gained access to certain personal information. This data included a wide range of sensitive information, and the company worked diligently to identify the individuals impacted by the breach. Additional steps were also taken to enhance the security of Cytek’s systems and prevent future incidents.

Cytek has reported the breach to law enforcement and is continuing to monitor the situation closely to protect its systems and the individuals affected.

When Did This Breach Occur?

The breach occurred on or around November 1, 2025, and was detected shortly thereafter. Cytek’s investigation confirmed the breach and its impact by November 28, 2025, and steps were taken to notify affected individuals and enhance security.

What Information Was Breached?

The personal information that may have been compromised in this data breach varies for each individual but may have included:

  • Name
  • Contact Information (e.g., postal address, email address, and phone number)
  • Date of Birth
  • Social Security Number
  • Driver’s License Number
  • Government-Issued ID Number
  • Citizenship Status
  • Signature
  • Health and Medical Information
  • Financial Account and Compensation Information
  • Cytek Employee Account Username and Password
  • This breach exposed sensitive personal data that could put individuals at risk for identity theft and fraud.

What You Can Do

To protect yourself from potential identity theft or fraud, Cytek recommends taking the following actions:

  1. Monitor Your Credit: You are entitled to one free credit report annually from each of the three major credit bureaus. Visit AnnualCreditReport.com or call 1-877-322-8228 to access your free credit report.
  2. Review Your Account Statements: Regularly check your bank, credit card, and other financial statements for signs of suspicious activity.
  3. Be Cautious of Unsolicited Communications: Be wary of any unsolicited emails or messages requesting personal information. Avoid clicking on links or downloading attachments from suspicious emails.
  4. Change Passwords: If you use similar usernames and passwords for other accounts, change those passwords immediately to reduce the risk of further unauthorized access.

Cytek is offering resources and additional steps for individuals to help secure their personal information, but it is important to stay vigilant in monitoring your accounts.

File a Data Breach Lawsuit Against Cytek Biosciences

If you received a notification from Cytek or believe your personal information was involved in this data breach, you may be eligible to file a lawsuit for compensation. Exposure of sensitive data such as Social Security numbers and health information puts you at risk for identity theft, and you may be entitled to seek compensation for potential damages.

Take Action Now. Don’t Stand Alone. If you were impacted by this data breach, fill out our quick, easy, and secure form to connect with a lawyer who specializes in data breach class action lawsuits. There is no cost to reach out to our legal partner, and you are under no obligation to proceed after speaking with someone from our team.

Explore your legal options and take steps to protect your rights. Contact Class Action U for a free consultation and ensure you receive the compensation you deserve.

VIEW PDF
Subscribe To Our Newsletter

New cases and investigations, settlement deadlines, and news straight to your inbox.

This field is for validation purposes and should be left unchanged.
Other Data Breaches
PROVAIL Data Breach
Date of Breach: June 8, 2025
Mercury Pharmacy Services Data Breach
Date of Breach: November 14, 2025
FirstFruits Farms Data Breach
Date of Breach: September 12, 2025
Show More

Frequently Asked Questions

A data breach occurs when sensitive, confidential, or protected information is accessed, stolen, or disclosed without authorization. Data breaches often occur through phishing emails, malware, weak passwords, insider threats, or unsecured databases. Indicators of a data breach can include unexpected password resets, suspicious account activity, unauthorized transactions, or notifications from companies about compromised information.If you suspect your data has been compromised, you must take measures and act quickly. Change passwords, enable two-factor authentication, review your financial accounts for unusual activity and consider freezing your credit.

Once stolen, your personal information may be sold on the dark web or used for identity theft and financial fraud. In some cases, hackers use the data to extort companies or launch further attacks. Victims often face long-term risks, including damage to credit and privacy.

If you receive a data breach notification, don’t ignore it. Immediately change passwords for the affected account and any others that share credentials. Enroll in any free credit monitoring services offered and monitor financial statements closely.

To pursue a data breach claim, you’ll need documentation showing your information was compromised and proof of resulting harm, such as fraudulent charges, credit score damage, or identity theft reports. Notification letters, financial records, and communication with the breached company can help support your claim.

Yes. If a company fails to protect consumer data or delays notifying victims, it may be held liable under state and federal privacy laws. Many victims join class action lawsuits to recover financial losses and hold negligent organizations accountable.

Data breach settlements vary widely depending on the size of the breach, type of data compromised, and damages suffered by victims. Payouts may include cash compensation, identity theft protection, or reimbursement for losses. Many settlements range from a few hundred to several thousand dollars per person. A skilled data breach lawyer can guide victims through the complex legal process, ensuring their rights are protected. If you’ve received a data breach notification or believe your personal data was exposed, you may be eligible for compensation. Contact Class Action U to learn more about how to join a data breach lawsuit and understand the process of filing.