High severity · published Sep 29, 2025
CVE-2025-41252
Username enumeration vulnerability
7.5
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NS
NSX · VMware
VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x; VMware NSX-T 3.x; VMware Cloud Foundation (with NSX) 5.x, 4.5.x · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-41252
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-41252
https
https://https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36150
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