CVE-2025-26399

This vulnerability is like a hidden “backdoor door” in the help desk software. If someone can reach your system, they can send a special message that tricks the software into running commands on the server—without needing a username or password. Once that happens, attackers can take over the machine and use it to steal data or disrupt your operations.

This matters if your business runs SolarWinds Web Help Desk (including deployments commonly referred to as Web Help Desk) on a server that attackers can reach. The key risk is reachability: it is network-exploitable with no authentication and no user interaction, and it is reachable in a default configuration. If the Web Help Desk service is exposed to the internet or otherwise reachable from attacker-controlled networks, you should treat it as actively dangerous.

This is RED because it is confirmed in the CISA Known Exploited Vulnerabilities catalog and is being used in ransomware campaigns. It requires no authentication and has been reported as actively targeted, so a delay increases the chance of compromise. Follow the vendor upgrade immediately and meet CISA’s action deadline.