Incident Summary On October 21, 2025, NSFOCUS Cloud DDoS Protection Service (Cloud DPS) detected and mitigated an 800G+ DDoS attack towards a critical infrastructure operator. The target network sustained a multi-vector volumetric DDoS attack peaking at 843.4 Gbps and 73.6 Mpps. The assault combined UDP-based floods (dominant) with amplification and...
Category: DDoS Mitigation
Alert of Buffer Overflow Vulnerabilities in Multiple Ivanti Products (CVE-2025-0282)
Overview Recently, NSFOCUS detected that Ivanti issued a security announcement and fixed buffer overflow vulnerabilities (CVE-2025-0282) in several products of Ivanti. Due to the stack-based buffer overflow in Ivanti Connect Secure, Ivanti Policy Secure and Ivanti Neurons for ZTA Gateways, an unauthenticated attacker can trigger a buffer overflow by sending...
XZ-Utils Supply Chain Backdoor Vulnerability Updated Advisory (CVE-2024-3094)
Vulnerability Overview Recently, NSFOCUS CERT detected that the security community disclosed a supply chain backdoor vulnerability in XZ-Utils (CVE-2024-3094), with a CVSS score of 10. Since the underlying layer of SSH relies on liblzma, when certain conditions are met, an attacker can use this vulnerability to bypass SSH authentication and...
Microsoft’s May security update for multiple high-risk product vulnerabilities
Overview On May 10, NSFOCUS CERT monitored that Microsoft had released a security update patch for May, which fixed 38 security issues, involving Win32k, Windows OLE, Microsoft SharePoint Server, Windows Pragmatic General Multicast (PGM) and other widely used products, including high-risk vulnerability types such as privilege enhancement and remote code...
How to Protect MEC from DDoS Attacks in 5G Networks
NSFOCUS at RSAC 2022 Why MEC is so important to the 5G Network? MEC (Multiple-access Edge Computing) is an important part of the 5G architecture, which is a type of distributed computing used to reduce bandwidth and improve response time, allowing operators to deploy their applications from centralized data centers...
NSFOCUS Managed Security Service Case: Response to a Hybrid SYN/ACK Flood Incident
Incident discovered In early 2021, a private cloud service provider in the United States was hit by a massive hybrid SYN Flood attack. As the service provider is a customer of NSFOCUS Cloud DDoS Protection Service and subscribed with Managed Security Service (MSS), the malicious traffic is noticed instantly by...
