DigiCert
Annual Distributed Denial-of-Service Analysis 2025
Pages
18
Time to read
22 mins
Publication
Language
English
Pages
18
Time to read
22 mins
Publication
Language
English
This report presents an analysis of Distributed Denial-of-Service (DDoS) attacks detected and mitigated by DigiCert's UltraDDoS Protect service throughout 2025. The report outlines the significant decrease in overall DDoS attack volume, with a total of 29,998 attacks recorded, representing an 88.91% reduction compared to 2024. This decline is attributed to global law enforcement actions and internal adjustments made by DigiCert's Security Operations Center. The report details the emergence of tsunami-class DDoS attacks, which exceeded one terabit per second, highlighting a shift towards fewer but more impactful attacks. It also discusses the operational characteristics of these attacks, noting that most were simpler and shorter in duration, with a majority relying on single attack vectors. The report emphasizes the importance of maintaining robust defenses against both routine and high-capacity DDoS threats, particularly in targeted sectors such as Financial Services and IT/Technical Services.