CVE-2025-41252
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-29

Last updated on: 2025-09-29

Assigner: VMware

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.
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Meta Information
Published
2025-09-29
Last Modified
2025-09-29
Generated
2026-06-16
AI Q&A
2025-09-29
EPSS Evaluated
2026-06-14
NVD
CVE-2025-41252
EUVD
EUVD-2025-31599
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
vmware nsx 4.1
vmware nsx 4.2
vmware cloud_foundation 5.x
vmware nsx 9.x
vmware cloud_foundation 4.5
vmware nsx 4.0
vmware nsx-t 3.x
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-203 The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
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Executive Summary

This vulnerability in VMware NSX allows an unauthenticated attacker to perform username enumeration. This means the attacker can determine which usernames are valid on the system without needing to log in, potentially enabling further unauthorized access attempts.

Impact Analysis

The vulnerability facilitates unauthorized access attempts by allowing attackers to identify valid usernames remotely without authentication. This can lead to targeted attacks such as brute force or credential stuffing against those usernames.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade affected VMware NSX products to the fixed versions listed: NSX 9.0.1.0; 4.2.2.2/4.2.3.1; 4.1.2.7; NSX-T 3.2.4.3; or apply the CCF async patch (KB88287). There are no workarounds available.

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