React2Shell continues to witness heavy exploitation, with threat actors leveraging the maximum-severity security flaw in React Server Components (RSC) to deliver cryptocurrency miners and an array of previously undocumented malware families, according to new findings from Huntress. This includes a Linux backdoor called PeerBlight, a reverse proxy tunnel named CowTunnel, and a Go-based post-exploitation implant referred to as ZinFoq. The cybersecurity company said it has observed attackers targeting numerous organizations via CVE-2025-55182, a critical security vulnerability in RSC that allows unauthenticated remote code execution. As of December 8, 2025, these efforts have been aimed at a wide range of sectors, but prominently the construction and entertainment industries. The first…