CVE-2025-40539 SolarWinds Serv-U Type Confusion Remote Code Execution Vulnerability
A type confusion flaw in Serv-U allows privileged attackers to execute arbitrary native code, requiring administrative access to exploit.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-40539?
CVE-2025-40539 is a critical memory corruption vulnerability in Solarwinds Serv-U, published on 24 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-704
Which versions are affected by CVE-2025-40539?
It affects 1 product.
Products include Solarwinds Serv-U.
How do I fix CVE-2025-40539?
No fix has been published for CVE-2025-40539 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-40539 being exploited?
There is no known exploitation of CVE-2025-40539 in the wild and no public exploit code.
Other vulnerabilities in Solarwinds Serv-U
Sources
Also known as GHSA-jjx5-vcwr-cwfq.