United States
USA
Unauthorized network access delays Sumner County school year
Sumner County Schools discovered unauthorized access to its computer network on 20 July 2026. Network disruption forced the district to postpone student registration to 4-5 August and move the first day of classes from 4 August to 10 August. The revised district calendar confirms the delayed opening.
71
Estimated severity
71 / 100
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Source reliability
No information
Approximate Date
20/07/2026
Targeted Company
SUMNER COUNTY SCHOOLS
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
Tennessee · United States
Operational Impact
Duration
21 days
Financial impact (USD M)
No information
Impact types
Service unavailabilityPlanning or scheduling disruptionOperational disruption
Affected sectors
Education & Research
Affected departments
Information Technology
Attack Profile
Attack types
Unauthorized access
Attributed threat actors
No information