CVE-2025-41252 Username enumeration vulnerability
Unauthenticated attackers can enumerate valid usernames in VMware NSX, facilitating unauthorized access attempts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-41252?
CVE-2025-41252 is a high-severity vulnerability in VMware NSX, published on 29 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Description: VMware NSX contains a username enumeration vulnerability. An unauthenticated malicious actor may exploit this to enumerate valid usernames, potentially leading to unauthorized access attempts.
Impact: Username enumeration → facilitates unauthorized access.
Attack Vector: Remote, unauthenticated.
Severity: Important.
CVSSv3: 7.5 (High).
Acknowledgments: Reported by the National Security Agency.
Affected Products:
* VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x
* NSX-T 3.x
* VMware Cloud Foundation (with NSX) 5.x, 4.5.x
Fixed Versions:
* NSX 9.0.1.0; 4.2.2.2/4.2.3.1 http://4.2.2.2/4.2.3.1 ; 4.1.2.7; NSX-T 3.2.4.3; CCF async patch (KB88287).
Workarounds: None.
Weakness: CWE-203
Which versions are affected by CVE-2025-41252?
How do I fix CVE-2025-41252?
No fix has been published for CVE-2025-41252 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-41252 being exploited?
There is no known exploitation of CVE-2025-41252 in the wild and no public exploit code.
Sources
Also known as GHSA-2gr4-4mrg-85rh.