Critical Vulnerabilities in SolarWinds Serv-U: Immediate Action Required
In February 2026, SolarWinds addressed four critical vulnerabilities in its Serv-U file transfer software, identified as CVE-2025-40538 through CVE-2025-40541. These flaws, each with a CVSS score of 9.1, could allow attackers with administrative privileges to execute arbitrary code as root. The vulnerabilities include broken access control, type confusion, and insecure direct object reference issues. While no active exploitation has been reported, similar past vulnerabilities have been targeted by threat actors, notably the China-based group Storm-0322. Organizations using Serv-U are urged to update to version 15.5.4 promptly to mitigate potential risks. ([helpnetsecurity.com](https://www.helpnetsecurity.com/2026/02/25/solarwinds-serv-u-vulnerabilities-cve-2025-40538-to-cve-2025-40541/?utm_source=openai))
Kill Chain









