Volt Typhoon's Silent Train Network Targets US Critical Infrastructure

• •Volt Typhoon's Silent Train network has exploited four confirmed zero-day vulnerabilities.
• •The group targets critical infrastructure and government sectors using compromised devices.
• •Operational tactics include rapid cleanup and rotation of compromised devices to evade detection.

The Chinese state-sponsored hacking group Volt Typhoon has been linked to a covert network called Silent Train, which has exploited at least four zero-day vulnerabilities over three years. This network utilizes rapidly rotating chains of compromised SOHO routers, IoT devices, and enterprise infrastructure to access sensitive systems undetected. The identified zero-days include CVE-2024-39717, CVE-2025-8875, CVE-2025-8876, CVE-2026-20127, and CVE-2026-16812, affecting critical platforms like Cisco's SD-WAN and N-able N-central. Hundreds of victims across telecommunications, government, defense, and critical infrastructure sectors have been reported, particularly in California, Texas, and Hawaii. The operational tactics include post-operation cleanup to erase all traces of the attack, making detection challenging. The campaign is ongoing, with confirmed. Researchers from Lumen Technologies' Black Lotus Labs have been tracking this activity since late 2023.