HackingStolen CredentialsData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedIDENTITY_BASICIDENTITY_GOVERNMENTHEALTH_BASICFINANCIAL_ACCOUNTCREDENTIALSMediumContained
CYTEK BIOSCIENCES, INC.
bd_f10136bccf81d097 · schema v1 · pii pii-v1
Full breach record for CYTEK BIOSCIENCES, INC. →Cytek Biosciences, Inc. notified the New Hampshire Attorney General of a security incident involving unauthorized access to systems affecting 3 New Hampshire residents. The breach occurred around November 1, 2025, and was discovered on November 5, 2025. Personal information of Cytek employees, including names, SSNs, health data, and credentials, was accessed. Cytek engaged forensic investigators, reported to law enforcement, and offered 24 months of credit monitoring.
Leak gap clock⏱ Leak >30d7 weeks discovery → filing
⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
This filing is one of 6 about the same incident.View merged incident
A leak claim by rhysida about this victim predates this filing by 51 days.View originating leak claim
Linked disclosures
Why this link?Ransomware claims (3)
- bd_eb75b2e7b9fce680Leak Siterhysidafiled 2026-01-25(35d gap)Verified by operator
- bd_c1046e1115ba4f23Leak Sitecmdorganizationfiled 2026-01-25(34d gap)Verified
- bd_b141b6898f0871edLeak Siterhysidafiled 2025-11-01(51d gap)Verified
Regulatory filings (2) · sorted by filing gap
- bd_1553fa181e3ff4fdIndiana State AGfiled 2025-12-22Verified
- bd_1ee03444beb45543Maine State AGfiled 2025-12-22Verified by operator
Source provenance
- Source URL
- https://mm.nh.gov/files/uploads/doj/remote-docs/cytek-biosciences-20251222.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- Dec 22, 2025
- Raw hash
- 18097d921280c9366343bc2463894bb5cfa3c99a45a2db0b9a3cfb2326373bd0
Reporting entity
- Name
- CYTEK BIOSCIENCES, INC.norm: cytek biosciences
- Domain
- cytekbio.com
Victim entity
- Name
- CYTEK BIOSCIENCES, INC.norm: cytek biosciences
- Domain
- cytekbio.com
Incident
- Discovered
- Nov 5, 2025
- Materiality determined
- —
- Notification sent
- Dec 22, 2025
- Affected individuals
- 3
- Data types
- IDENTITY_BASICIDENTITY_GOVERNMENTHEALTH_BASICFINANCIAL_ACCOUNTCREDENTIALS
- Attack vector
- Unauthorized Access
- MITRE ATT&CK
- T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
- Threat actor
- ExternalFinancial
- Regulator citations
- reporting the issue to law enforcementnotified Attorney General John M. Formella
- Initial access
- valid_credentials
Compliance
- Time to disclose
- 7 weeks(47 days from discovery to filing)
- Compliance flags
- Leak >30d
- Discovery-date grounding
- unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.