CVE-2026-20178

{
  "id": "CVE-2026-20178",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-17T18:17:35.587",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the browser-based version of Cisco Webex App could have allowed an unauthenticated, remote attacker to redirect users to a malicious webpage. Cisco has addressed this vulnerability in the Cisco Webex App, and no customer action is needed.\r\n\r This vulnerability existed due to improper input validation of URL parameters in an HTTP request. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to click a crafted URL. A successful exploit could have allowed the attacker to redirect a user to a malicious website."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la versión basada en navegador de Cisco Webex App podría haber permitido a un atacante remoto no autenticado redirigir a los usuarios a una página web maliciosa. Cisco ha abordado esta vulnerabilidad en la Cisco Webex App, y no se requiere ninguna acción por parte del cliente.\nEsta vulnerabilidad existía debido a una validación de entrada incorrecta de los parámetros URL en una solicitud HTTP. Antes de que esta vulnerabilidad fuera abordada, un atacante podría haber explotado esta vulnerabilidad al persuadir a un usuario para hacer clic en una URL manipulada. Un exploit exitoso podría haber permitido al atacante redirigir a un usuario a un sitio web malicioso."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Cisco",
          "product": "Cisco Webex App",
          "versions": [
            {
              "version": "N/A",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-17T18:13:20.277003Z",
          "id": "CVE-2026-20178",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:cisco:webex_web_app:-:*:*:*:*:-:*:*",
              "matchCriteriaId": "B387B804-3EE7-4A0B-8ED5-7FD5E51C2319"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-app-redirect-KOyxhffH",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}