Attorneys at Almeida Law Group are investigating whether a class action lawsuit can be filed on behalf of individuals affected by a possible Mesan USA data breach. According to dark web monitoring sources, a hacker group calling itself Global Secret Group claimed responsibility for a cyberattack on Mesan USA in a post first observed in September 2026, alleging it had gained access to internal company systems. As of this writing, Mesan USA has not issued a public confirmation of the incident, and the exact scope of any exposed data remains unknown. If you believe you were affected, contact Almeida Law Group.
About Mesan USA
Mesan USA is the Americas subsidiary of the MESAN Group of Hong Kong, headquartered in Doral, Florida, with an additional office in Miami. The company specializes in evaporative cooling equipment, including high-volume low-speed fans, cooling towers, and fluid coolers, and serves large-scale commercial and industrial customers. It holds ISO-9001 and CTI-STD-201 certifications and reports approximately $5.4 million in annual revenue with a small workforce of roughly 10 to 50 employees.
What Happened?
On September 9th, 2026, the ransomware group Global Secret Group posted Mesan USA on its dark-web leak site. The claim was indexed by Ransomware.live and subsequently flagged by third-party breach monitoring services HackNotice and a cybersecurity blog, hendryadrian.com, which explicitly noted that the information is based solely on attacker claims and remains unconfirmed. GSG alleges it exfiltrated approximately 184 GB of data comprising 188,562 files across 26,169 folders. The specific types of data allegedly contained in those files have not been disclosed by any source. No official statement, regulatory filing, or breach notification from Mesan USA has been found, and no independent corroborating source has confirmed the incident.
Global Secret Group is an emerging ransomware and data-extortion operation first observed in January 2026. WatchGuard classifies GSG as a “Data Broker” type that employs direct extortion, double extortion, and free data leaks. As of July 2026, GSG had claimed over 202,000 victims on its leak site, though those numbers are unverified and may be inflated. Threat intelligence profiles from Mallory.ai and SOCRadar describe the group as broadly opportunistic, targeting manufacturing, financial services, healthcare, real estate, and other sectors, with a concentration of victims in the United States. No prior security incidents involving Mesan USA were identified, and no litigation related to this incident has been found.
Key Facts at a Glance
- Company or Organization: Mesan USA
- Industry: Industrial Machinery & Equipment / Manufacturing (Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing)
- Location: Doral, Florida (headquarters); Miami, Florida (additional office)
- Incident type: Ransomware claim / alleged data exfiltration (attacker-side allegation, unconfirmed)
- Source: Ransomware.live – Mesan USA / Global Secret Group claim; HackNotice – Mesan USA; hendryadrian.com – Ransom! Mesan USA (SEP-2026); WatchGuard – Global Secret Group Ransomware Profile; Mallory.ai – Global Secret Group Profile
What Should You Do?
Even though this incident has not been confirmed by Mesan USA, it is reasonable to take precautionary steps now. Consider placing a fraud alert or credit freeze with the three major credit bureaus — Equifax, Experian, and TransUnion — to limit the risk of someone opening new accounts in your name. You can request your free annual credit reports at AnnualCreditReport.com and review them for any unfamiliar activity. Monitor your existing financial accounts closely for unauthorized transactions. If you receive any identity theft protection enrollment offer connected to this incident, enroll promptly and note any deadlines. If you believe your information has been misused, visit IdentityTheft.gov for step-by-step guidance from the Federal Trade Commission.
Your Legal Rights
If your personal information was involved in this breach, you may have legal rights depending on the facts of the incident and the law in your state. Almeida Law Group represents consumers in data breach and privacy litigation and can help you evaluate whether you may have a claim. Contact us at (708) 529-5418 or through our contact page for a free case evaluation.
