SolarWinds Issues Patch for Four Critical Serv-U Flaws
🔒 SolarWinds has released updates to address four critical vulnerabilities in its Serv-U file transfer software, each rated 9.1 on the CVSS scale. The flaws include a broken access control that can create a system admin (CVE-2025-40538), two type confusion bugs (CVE-2025-40539 and CVE-2025-40540), and an IDOR (CVE-2025-40541) — all capable of enabling remote code execution when exploited with administrative privileges. The issues affect Serv-U 15.5 and are fixed in Serv-U 15.5.4. SolarWinds warns Windows deployments carry medium risk because services often run under less-privileged accounts by default, and while no active exploitation has been reported, similar past defects were abused by threat actors such as Storm-0322.
