HackingCustomer Data InvolvedLowResolved
CYTEK BIOSCIENCES, INC.
bd_1ee03444beb45543 · schema v1 · pii pii-v1
Full breach record for CYTEK BIOSCIENCES, INC. →Cytek Biosciences, Inc. reported a data breach to the Maine Attorney General, stating that an external system breach (hacking) occurred on November 1, 2025. The breach was discovered on November 28, 2025. One Maine resident was affected. The company offered 24 months of identity theft protection services to those impacted.
Leak gap clock⏱ Leak >30d24 days 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_f10136bccf81d097New Hampshire State AGfiled 2025-12-22Verified
Source provenance
- Source URL
- https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/37b0bb9e-101d-4580-a543-6d58c3cd7d40.html
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
- c94648a365648bea9f664bb368b9ae62387d881da94c26c47b9513c968883b04
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 28, 2025
- Materiality determined
- —
- Notification sent
- Dec 22, 2025
- Affected individuals
- 1
- Data types
- —
- Attack vector
- Unauthorized Access
- Threat actor
- External
Compliance
- Time to disclose
- 24 days(24 days from discovery to filing)
- Compliance flags
- Leak >30dME AG ≤30d · 24d
- 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.
- Clock breakdown
Statute Window Elapsed Threshold Status Maine Discovered: Nov 28, 2025→ Filed with AG: Dec 22, 202524d 30 days ME AG ≤30d
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.