Serv-U Type Confusion Enables Privileged Native Code Execution
CVE-2025-40539 Published on February 24, 2026

SolarWinds Serv-U Type Confusion Remote Code Execution Vulnerability
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.

NVD

Vulnerability Analysis

CVE-2025-40539 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
HIGH
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Incorrect Type Conversion or Cast

The software does not correctly convert an object, resource, or structure from one type to a different type.


Products Associated with CVE-2025-40539

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SolarWinds Serv U
 

Affected Versions

SolarWinds Serv-U Version SolarWinds Serv-U 15.5.3 and prior versions is affected by CVE-2025-40539

Exploit Probability

EPSS
0.06%
Percentile
19.66%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.