Type Confusion Vulnerability in Serv-U by SolarWinds
CVE-2025-40539

9.1CRITICAL

Key Information:

Vendor

Solarwinds
Status
Serv-u
Vendor
CVE Published:
24 February 2026

What is CVE-2025-40539?

A type confusion vulnerability is present in Serv-U, allowing attackers to exploit the flaw to execute arbitrary native code with elevated privileges. This vulnerability necessitates administrative privileges for exploitation. While the potential impact varies, Windows deployments may be at lesser risk since services typically operate under lower-privileged service accounts by default.

Affected Version(s)

Serv-U Windows SolarWinds Serv-U 15.5.3 and prior versions

References

https://www.solarwinds.com/trust-center/security-advisori...
https://documentation.solarwinds.com/en/success_center/se...

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.