SolarWinds patched three critical vulnerabilities in its Serv-U file transfer solution that could allow remote code execution.
SolarWinds addressed three critical vulnerabilities in its Serv-U file transfer solution that could allow remote code execution.
The first vulnerability, tracked as CVE-2025-40549 (CVSS score 9.1), is a path restriction bypass issue that impacts Serv-U. An attacker with access to admin privileges can trigger the flaw to execute code on a directory.
“A Path Restriction Bypass vulnerability exists in Serv-U that when abused, could give a malicious actor with access to admin privileges the ability to execute code on a directory.” reads the advisory. “This issue requires administrative privileges to abuse. On Windows systems, this scored as medium due to differences in how paths and home directories are handled.”
The second vulnerability fixed by the company, tracked as CVE-2025-40548 (CVSS score 9.1), is a broken access control that can lead to remote code execution vulnerability.
“A missing validation process exists in Serv U when abused, could give a malicious actor with access to admin privileges the ability to execute code.” reads the advisory. “This issue requires administrative privileges to abuse. On Windows deployments, the risk is scored as a medium because services frequently run under less-privileged service accounts by default.”
SolarWinds pointed out that CVE-2025-40547 and CVE-2025-40548 carry only medium severity on Windows because the affected services usually run under low-privileged accounts.
The third flaw, CVE-2025-40547 (CVSS score 9.1), is a logic error vulnerability in Serv-U which. An attacker with access to admin privileges can exploit the flaw to execute arbitrary code.
The flaws affect SolarWinds Serv-U 15.5.2.2.102, the company released version 15.5.3. to address them.
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