United States
USA
Chelan County cyber incident disrupts government systems and creates document backlog
An unauthorized actor accessed Chelan County systems between May 20 and May 24, 2026, when the county detected malicious activity and shut down networked systems. The system-wide disruption materially affected county operations: the Clerk's Office accumulated more than 6,000 documents awaiting processing, state-system connectivity was not regained until June 22, and electronic filing remained unavailable until July 1.
78
Estimated severity
78 / 100
—
Source reliability
No information
Approximate Date
20/05/2026
Targeted Company
CHELAN COUNTY
Targeted Company Supply Chain Impact
Distribution & Fulfillment
Procurement & Sourcing
Production & Manufacturing
Sales (Retail & Ecommerce)
Warehousing
Service Delivery
Unrecognized Impact
Supply Chain Relations
No information
Geographic Impact
Country Targeted Company
Other Affected Countries
No other affected countries reported
Target country
United States
Affected countries
United States
Impacted regions
Chelan County · United States
Operational Impact
Duration
No information
Financial impact (USD M)
No information
Impact types
Service unavailabilityBacklog or order accumulationERP or business system disruption
Affected sectors
Government & Public Administration
Affected departments
Information Technology
Attack Profile
Attack types
MalwareUnauthorized accessData breach
Attributed threat actors
No information
Sources
Incident Sources