United States
USA
Pierce County Library cyberattack causes multiweek service outage
Pierce County Library System discovered unauthorized external access on April 21, 2025 and took computer-network systems offline. The response caused a multiweek outage across its branches, leaving catalog and other library services unavailable and disrupting normal circulation workflows; later notices confirmed that attackers had accessed the network between April 15 and April 21 and stolen data.
68
Estimated severity
68 / 100
94
Source reliability
94 / 100
Approximate Date
15/04/2025
Targeted Company
PIERCE COUNTY LIBRARY SYSTEM
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
Washington · United States
Operational Impact
Duration
No information
Financial impact (USD M)
No information
Impact types
Service unavailabilityService degradationOperational disruption
Affected sectors
Education & Research
Affected departments
Information Technology
Attack Profile
Attack types
Unauthorized accessData exfiltration
Attributed threat actors
No information
Sources
Incident Sources
gigharbornow.orghttps://www.gigharbornow.org/news/community/library-confirms-cybersecurity-event-caused-outage/securityweek.comhttps://www.securityweek.com/pierce-county-library-data-breach-impacts-340000/gigharbornow.orghttps://www.gigharbornow.org/news/education/gig-harbor-library-outage-when-will-online-services-be-restored/