CVE-2025-40539
Critical
Description
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.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Solarwinds Serv-u
PublishedFeb 24, 2026
First seenFeb 24, 2026
Weakness typeCWE-704CWE-704
How to fix
Update
- solarwinds serv-u15.5.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| solarwinds serv-u | v < 15.5.4 | 15.5.4 |
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