China-Linked UNC3886 Exploits Juniper Routers for Espionage

Mar 24, 2025 · 6 min read · Summary Mandiant published a blog detailing the discovery of custom backdoors on Juniper Networks’ Junos OS routers, which they identified in mid-2024 and attributed to the China-nexus group UNC3886. These TINYSHELL-based backdoors had both active an...