Vulnerability in Vmware Nsx
CVE-2025-41252
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.
EPSS: 0.009 (55.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Vmware Nsx — versions 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
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2025-41252?
- CVE-2025-41252 is a high-severity vulnerability in Vmware Nsx, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2025-09-29.
- How severe is CVE-2025-41252?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-41252 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.