CVE-2025-41252

Username enumeration vulnerability

Published Sep 29, 2025 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-31599 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.
History
Type Values Removed Values Added
First Time appeared Vmware
Vmware cloud Foundation
Vmware nsx
Vmware nsx-t
Vendors & Products Vmware
Vmware cloud Foundation
Vmware nsx
Vmware nsx-t
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Username enumeration vulnerability
Weaknesses CWE-203
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
vmware
Published
Updated
Sep 29, 2025, 7:14 PM
Reserved
Apr 16, 2025, 9:30 AM
Status
Deferred
Published
Sep 29, 2025, 7:15 PM
Modified
Oct 9, 2026, 9:10 AM