Trellix Cyberattack Exposes User Data in Indiana Filing
Musarubra US LLC, operating as the cybersecurity provider Trellix, reported a data security incident to Indiana authorities on August 28, 2026. The breach, which occurred in February 2026, exposed various personal and corporate data categories, raising concerns due to Trellix's role in safeguarding sensitive digital assets.
- State
- Indiana
- Breach date
- February 28, 2026
- Reported
- August 28, 2026
What may have been exposed
- Full Name
- Email Address
- Password or Credential Hash
- Mailing Address
- Phone Number
- Employment and Professional Title
- Corporate Account History
- Internal System Access Logs
Musarubra US LLC, known by its brand name Trellix, filed a report with Indiana regulators concerning a data security incident. This filing, submitted on August 28, 2026, details a breach that was identified as occurring on February 28, 2026.
The compromised information includes individuals' Full Name, Email Address, Password or Credential Hash, Mailing Address, Phone Number, Employment and Professional Title, Corporate Account History, and Internal System Access Logs. These details are derived from the official public report.
Exposure of such information can create risks for affected individuals. Full names, email addresses, and phone numbers may be used in targeted phishing campaigns or other unsolicited communications. If compromised credential hashes are linked to accounts, there is a risk of unauthorized access, particularly if individuals reuse passwords across different services.
Individuals who receive a breach notification related to this incident should remain vigilant. It is generally recommended to change passwords for any accounts that might be associated with the exposed email address, especially if those passwords are reused. Additionally, monitoring accounts for unusual activity and being cautious of unexpected emails or calls claiming to be from Trellix or other institutions is a good practice.
This incident underscores the continuous challenge of maintaining digital security, even for companies specializing in cybersecurity solutions. All facts presented are based on public disclosures made to regulatory bodies.
What to do if you were affected
Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.
Secure your online accounts
Change the password on any account that reused an exposed password and turn on two-factor authentication wherever it's offered.
Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.
What to know about the Musarubra US LLC dba Trellix data breach
- How many people were affected by the Musarubra US LLC dba Trellix data breach, and what was exposed?
- The filing does not give a count of affected people and lists the following information as involved: Full Name, Email Address, Password or Credential Hash, Mailing Address, Phone Number, Employment and Professional Title, Corporate Account History, Internal System Access Logs. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
- Where can I see the official Musarubra US LLC dba Trellix breach notice?
- Musarubra US LLC dba Trellix's report is published by the Indiana Attorney General: https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/security-breaches/#musarubra-us-llc-dba-trellix-2026 Compare it with the letter you received to confirm the dates and details match.
- What should I do after getting the Musarubra US LLC dba Trellix data breach notice?
- Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
- Is the Musarubra US LLC dba Trellix data breach letter legit or a scam?
- A notice from Musarubra US LLC dba Trellix in the mail matches the breach Musarubra US LLC dba Trellix reported to the Indiana Attorney General on August 28, 2026. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Musarubra US LLC dba Trellix through a phone number or website you find yourself.
- Did Musarubra US LLC dba Trellix offer free credit monitoring?
- Any free monitoring Musarubra US LLC dba Trellix is offering will be described in the notice you received, along with an activation code and a sign-up deadline. Because financial or account details are listed in this filing, watch your bank and card statements closely as well. Using the free service won't stop you from joining a lawsuit or settlement later.
- Can I sue Musarubra US LLC dba Trellix over the data breach?
- It depends on what was exposed, the law in Indiana and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
- Is there a Musarubra US LLC dba Trellix data breach class action lawsuit?
- Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Musarubra US LLC dba Trellix. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
- How much could a Musarubra US LLC dba Trellix data breach settlement or claim be worth?
- There is no set amount, and no Musarubra US LLC dba Trellix settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. The filing lists Full Name, Email Address, Password or Credential Hash as involved. Keep receipts and records; they're what damages claims are built on.
- Do I need a Musarubra US LLC dba Trellix data breach lawyer or attorney?
- An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.
Source: Indiana Attorney General filing
Related data breach cases
- Bozeman School District
- Bozeman School DistrictIN
- Teamsters Local 17
- Teamsters Local 17IN
- Bank
- BankIN
- PeoplesBank
- McKenzie Creative Brands
- MEBS Global Reach
- Midvale Indemnity and American Family Connect Insurance Company
- American Motorcyclist Association
- Nishiyamato Academy
- Deer Management Co. LLC dba Bessemer Venture Partners
- World Acceptance Corporation