CVE-2025-40539CWE-704

SolarWinds Serv-U Type Confusion Remote Code Execution Vulnerability

Critical · published February 24, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
38.8
In the wild
Unconfirmed
What it is

A type confusion vulnerability exists in Serv-U which when exploited, gives a malicious actor the ability to execute arbitrary native code as privileged account.

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00463 · 38.8th percentile
Weakness
CWE-704 · Incorrect Type Conversion or Cast
Published
2026-02-24T07:40Z
EPSS history
Timeline
  • 24 FEB 07:40Z
    SolarWinds Serv-U Type Confusion Remote Code Execution Vulnerability
    cvelistv5