Day: February 9, 2026 - RH-ISAC Blog

Summary Threat actors are actively exploiting critical vulnerabilities in internet-exposed SolarWinds Web Help Desk (WHD) instances to achieve unauthenticated remote code execution. These intrusions follow a high-impact pattern where a single unpatched application serves as a gateway for lateral movement and full domain compromise. Once inside, attackers deploy a mix of legitimate remote monitoring tools and…

Executive Summary On 9 February 2026, Singapore authorities confirmed that the China-linked cyber espionage group UNC3886 conducted a deliberate, targeted, and well-planned operation against all four of the country’s major telecommunications operators: M1, SIMBA Telecom, Singtel, and StarHub. Threat Actor Profile UNC3886 is reported as a highly disciplined and stealthy state-linked threat actor. The group targets strategic organizations…