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CVE-2025-40539

HIGH CVSS 3.1: 7.2 EPSS 0.07%
Updated Feb 24, 2026
Solarwinds
Parameter Value
CVSS 7.2 (HIGH)
Affected Versions before 15.5.4
Fixed In 15.5.4
Type CWE-704
Vendor Solarwinds
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Solarwinds Serv-U
cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:*
15.5.4