CVE-2025-41251: vmware NSX · Weak Password Recovery
Affects vmware NSXSource CVE Database V5
Not known to be exploited · CVSS 8.1 High · fixed in 4.6.0 : patch vmware NSX soon.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.6.0, 4.3.0, 4.2.0 +1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 29 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade vmware NSX to 4.6.0, 4.3.0, 4.2.0 or 4.1.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| vmware NSX | Affected
| Fixed in
|
AI-suggested
- Immediately apply the official patches released by VMware for the affected NSX versions: NSX 9.0.1.0, 4.2.2.2/4.2.3.1, 4.1.2.7, NSX-T 3.2.4.3, and the Cloud Foundation async patch (KB88287).
- Restrict access to NSX management interfaces using network segmentation and firewall rules to limit exposure to trusted IP addresses only.
- Implement multi-factor authentication (MFA) on all NSX management accounts to reduce the risk of credential compromise even if brute-force attacks succeed.
- Monitor authentication logs and password recovery attempts for unusual activity indicative of username enumeration or brute-force attacks.
- Enforce strong password policies and consider account lockout thresholds to mitigate brute-force attack effectiveness.
- Conduct regular security assessments and penetration tests focusing on NSX environments to detect potential exploitation attempts.
- Educate administrators and security teams about this vulnerability and the importance of timely patching and monitoring.
- If immediate patching is not feasible, consider temporarily disabling password recovery features or restricting their access, if possible, until patches can be applied.
Description
VMware NSX contains a weak password recovery mechanism vulnerability. An unauthenticated malicious actor may exploit this to enumerate valid usernames, potentially enabling brute-force attacks. Impact: Username enumeration → credential brute force risk. Attack Vector: Remote, unauthenticated. Severity: Important. CVSSv3: 8.1 (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.