GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-41252 (GCVE-0-2025-41252)

Vulnerability from cvelistv5 – Published: 2025-09-29 19:02 – Updated: 2025-09-29 19:14
VLAI
Title
Username enumeration vulnerability
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-29 19:14 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
VMware NSX Affected: VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x (custom)
Affected: VMware NSX-T 3.x (custom)
Affected: VMware Cloud Foundation (with NSX) 5.x, 4.5.x
Unaffected: VMware NSX 9.0.1.0; 4.2.2.2/4.2.3.1; 4.1.2.7; NSX-T 3.2.4.3; CCF async patch (KB88287)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-41252",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-29T19:14:25.259914Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-09-29T19:14:38.914Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "NSX",
          "vendor": "VMware",
          "versions": [
            {
              "status": "affected",
              "version": "VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "VMware NSX-T 3.x",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "VMware Cloud Foundation (with NSX) 5.x, 4.5.x"
            },
            {
              "status": "unaffected",
              "version": "VMware NSX 9.0.1.0; 4.2.2.2/4.2.3.1; 4.1.2.7; NSX-T 3.2.4.3; CCF async patch (KB88287)"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\u003cb\u003e\u003c/b\u003e\u003c/p\u003e\u003cp\u003eDescription: VMware NSX contains a username enumeration vulnerability. An unauthenticated malicious actor may exploit this to enumerate valid usernames, potentially leading to unauthorized access attempts.\u003c/p\u003e\n\u003cp\u003eImpact: Username enumeration \u2192 facilitates unauthorized access.\u003c/p\u003e\n\u003cp\u003eAttack Vector: Remote, unauthenticated.\u003c/p\u003e\n\u003cp\u003eSeverity: Important.\u003c/p\u003e\n\u003cp\u003eCVSSv3: 7.5 (High).\u003c/p\u003e\n\u003cp\u003eAcknowledgments: Reported by the National Security Agency.\u003c/p\u003e\n\u003cp\u003eAffected Products:\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eVMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x\u003cbr\u003e\u003c/li\u003e\u003cli\u003eNSX-T 3.x\u003cbr\u003e\u003c/li\u003e\u003cli\u003eVMware Cloud Foundation (with NSX) 5.x, 4.5.x\u003cbr\u003e\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\n\n\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\n\u003cp\u003eFixed Versions:\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eNSX 9.0.1.0; \u003ca target=\"_blank\" rel=\"nofollow\" href=\"http://4.2.2.2/4.2.3.1\"\u003e4.2.2.2/4.2.3.1\u003c/a\u003e; 4.1.2.7; NSX-T 3.2.4.3; CCF async patch (KB88287).\u003cbr\u003e\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\u003cp\u003eWorkarounds: None.\u003c/p\u003e\u003cbr\u003e"
            }
          ],
          "value": "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.\n\n\nImpact: Username enumeration \u2192 facilitates unauthorized access.\n\n\nAttack Vector: Remote, unauthenticated.\n\n\nSeverity: Important.\n\n\nCVSSv3: 7.5 (High).\n\n\nAcknowledgments: Reported by the National Security Agency.\n\n\nAffected Products:\n\n\n\n  *  VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x\n\n  *  NSX-T 3.x\n\n  *  VMware Cloud Foundation (with NSX) 5.x, 4.5.x\n\n\n\n\n\n\n\n\n\n\n\n\nFixed Versions:\u00a0\n\n\n\n  *  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).\n\n\n\n\n\n\nWorkarounds: None."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-203",
              "description": "CWE-203 Observable Discrepancy",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T19:02:07.283Z",
        "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "shortName": "vmware"
      },
      "references": [
        {
          "url": "https://https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36150"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Username enumeration vulnerability",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
    "assignerShortName": "vmware",
    "cveId": "CVE-2025-41252",
    "datePublished": "2025-09-29T19:02:07.283Z",
    "dateReserved": "2025-04-16T09:30:25.625Z",
    "dateUpdated": "2025-09-29T19:14:38.914Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-41252",
      "date": "2026-09-20",
      "epss": "0.00686",
      "percentile": "0.51185"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "NSX",
                "vendor": "VMware",
                "versions": [
                  {
                    "status": "affected",
                    "version": "VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x",
                    "versionType": "custom"
                  },
                  {
                    "status": "affected",
                    "version": "VMware NSX-T 3.x",
                    "versionType": "custom"
                  },
                  {
                    "status": "affected",
                    "version": "VMware Cloud Foundation (with NSX) 5.x, 4.5.x"
                  },
                  {
                    "status": "unaffected",
                    "version": "VMware NSX 9.0.1.0; 4.2.2.2/4.2.3.1; 4.1.2.7; NSX-T 3.2.4.3; CCF async patch (KB88287)"
                  }
                ]
              }
            ],
            "source": "security@vmware.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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.\n\n\nImpact: Username enumeration \u2192 facilitates unauthorized access.\n\n\nAttack Vector: Remote, unauthenticated.\n\n\nSeverity: Important.\n\n\nCVSSv3: 7.5 (High).\n\n\nAcknowledgments: Reported by the National Security Agency.\n\n\nAffected Products:\n\n\n\n  *  VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x\n\n  *  NSX-T 3.x\n\n  *  VMware Cloud Foundation (with NSX) 5.x, 4.5.x\n\n\n\n\n\n\n\n\n\n\n\n\nFixed Versions:\u00a0\n\n\n\n  *  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).\n\n\n\n\n\n\nWorkarounds: None."
          }
        ],
        "id": "CVE-2025-41252",
        "lastModified": "2026-06-17T09:22:40.600",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "security@vmware.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-41252",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-29T19:14:25.259914Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-09-29T19:15:35.317",
        "references": [
          {
            "source": "security@vmware.com",
            "url": "https://https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36150"
          }
        ],
        "sourceIdentifier": "security@vmware.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-203"
              }
            ],
            "source": "security@vmware.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2025-09-30T20:56:11+00:00",
      "cve": "CVE-2025-41252",
      "id": "CVE-2025-41252",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Username enumeration vulnerability",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-41252.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-41252",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-09-29T19:14:25.259914Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-09-29T19:14:30.473Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "NSX",
              "vendor": "VMware",
              "versions": [
                {
                  "status": "affected",
                  "version": "VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x",
                  "versionType": "custom"
                },
                {
                  "status": "affected",
                  "version": "VMware NSX-T 3.x",
                  "versionType": "custom"
                },
                {
                  "status": "affected",
                  "version": "VMware Cloud Foundation (with NSX) 5.x, 4.5.x"
                },
                {
                  "status": "unaffected",
                  "version": "VMware NSX 9.0.1.0; 4.2.2.2/4.2.3.1; 4.1.2.7; NSX-T 3.2.4.3; CCF async patch (KB88287)"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003e\u003cb\u003e\u003c/b\u003e\u003c/p\u003e\u003cp\u003eDescription: VMware NSX contains a username enumeration vulnerability. An unauthenticated malicious actor may exploit this to enumerate valid usernames, potentially leading to unauthorized access attempts.\u003c/p\u003e\n\u003cp\u003eImpact: Username enumeration \u2192 facilitates unauthorized access.\u003c/p\u003e\n\u003cp\u003eAttack Vector: Remote, unauthenticated.\u003c/p\u003e\n\u003cp\u003eSeverity: Important.\u003c/p\u003e\n\u003cp\u003eCVSSv3: 7.5 (High).\u003c/p\u003e\n\u003cp\u003eAcknowledgments: Reported by the National Security Agency.\u003c/p\u003e\n\u003cp\u003eAffected Products:\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eVMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x\u003cbr\u003e\u003c/li\u003e\u003cli\u003eNSX-T 3.x\u003cbr\u003e\u003c/li\u003e\u003cli\u003eVMware Cloud Foundation (with NSX) 5.x, 4.5.x\u003cbr\u003e\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\n\n\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\n\u003cp\u003eFixed Versions:\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eNSX 9.0.1.0; \u003ca target=\"_blank\" rel=\"nofollow\" href=\"http://4.2.2.2/4.2.3.1\"\u003e4.2.2.2/4.2.3.1\u003c/a\u003e; 4.1.2.7; NSX-T 3.2.4.3; CCF async patch (KB88287).\u003cbr\u003e\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\u003cp\u003eWorkarounds: None.\u003c/p\u003e\u003cbr\u003e"
                }
              ],
              "value": "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.\n\n\nImpact: Username enumeration \u2192 facilitates unauthorized access.\n\n\nAttack Vector: Remote, unauthenticated.\n\n\nSeverity: Important.\n\n\nCVSSv3: 7.5 (High).\n\n\nAcknowledgments: Reported by the National Security Agency.\n\n\nAffected Products:\n\n\n\n  *  VMware NSX 9.x.x.x, 4.2.x, 4.1.x, 4.0.x\n\n  *  NSX-T 3.x\n\n  *  VMware Cloud Foundation (with NSX) 5.x, 4.5.x\n\n\n\n\n\n\n\n\n\n\n\n\nFixed Versions:\u00a0\n\n\n\n  *  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).\n\n\n\n\n\n\nWorkarounds: None."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-203",
                  "description": "CWE-203 Observable Discrepancy",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-09-29T19:02:07.283Z",
            "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
            "shortName": "vmware"
          },
          "references": [
            {
              "url": "https://https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36150"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Username enumeration vulnerability",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "assignerShortName": "vmware",
        "cveId": "CVE-2025-41252",
        "datePublished": "2025-09-29T19:02:07.283Z",
        "dateReserved": "2025-04-16T09:30:25.625Z",
        "dateUpdated": "2025-09-29T19:14:38.914Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.