United States
USA
Uvalde CISD ransomware cancels classes for most of a school week
A ransomware incident affecting Uvalde CISD servers caused the district to cancel classes from 15 through 18 September 2025 while restoring technology and safety-related systems. The district later reported that internet, security and HVAC systems were restored for the 22 September return to class and that investigators had not identified a data breach.
75
Estimated severity
75 / 100
91
Source reliability
91 / 100
Approximate Date
13/09/2025
Targeted Company
UVALDE CONSOLIDATED INDEPENDENT SCHOOL DISTRICT
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
Texas · United States
Operational Impact
Duration
4 days
Financial impact (USD M)
No information
Impact types
Service unavailabilityOperational disruption
Affected sectors
Education & Research
Affected departments
Information Technology
Attack Profile
Attack types
Ransomware
Attributed threat actors
No information
Sources
Incident Sources
ksat.comhttps://www.ksat.com/news/local/2025/09/13/uvalde-cisd-to-close-most-of-next-week-due-to-ransomware-issue/ksat.comhttps://www.ksat.com/news/local/2025/09/18/uvalde-cisd-to-resume-classes-next-week-after-ransomware-attack-prompts-week-long-cancellations/ksat.comhttps://www.ksat.com/news/local/2025/09/20/uvalde-cisd-says-no-data-breach-occurred-in-ransomware-attack-that-shut-down-campuses-for-a-week/expressnews.comhttps://www.expressnews.com/news/article/uvalde-school-district-closure-ransomware-attack-21046532.php