{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "O2",
          "vendor": "O2 UK",
          "versions": [
            {
              "lessThanOrEqual": "2025-05-17",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "exclusively-hosted-service"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "O2 UK before 2025-05-19 allows subscribers to determine the Cell ID of other subscribers by initiating an IMS (IP Multimedia Subsystem) call and then reading the utran-cell-id-3gpp field of a Cellular-Network-Info SIP header, aka an ECI (E-UTRAN Cell Identity) leak. The Cell ID might be usable to identify a cell location via crowdsourced data, and might correspond to a small physical area (e.g., if the called party is in a city centre). Removal of the Cellular-Network-Info header is mentioned in section 4.4.19 of ETSI TS 124 229."
    },
    {
      "lang": "es",
      "value": "O2 UK, hasta el 17/05/2025, permite a los suscriptores determinar el ID de celda de otros suscriptores iniciando una llamada IMS (Subsistema Multimedia IP) y leyendo el campo utran-cell-id-3gpp de una cabecera SIP Cellular-Network-Info, tambi\u00e9n conocida como fuga de ECI (Identidad de Celda E-UTRAN). El ID de celda podr\u00eda utilizarse para identificar la ubicaci\u00f3n de una celda mediante datos de colaboraci\u00f3n abierta y podr\u00eda corresponder a un \u00e1rea f\u00edsica peque\u00f1a (por ejemplo, si el receptor de la llamada se encuentra en el centro de una ciudad). La eliminaci\u00f3n de la cabecera Cellular-Network-Info se menciona en la secci\u00f3n 4.4.19 de ETSI TS 124 229."
    }
  ],
  "id": "CVE-2025-48219",
  "lastModified": "2026-06-17T09:29:18.527",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "cve@mitre.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-48219",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-05-19T20:06:04.095969Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-05-18T15:15:17.340",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "https://mastdatabase.co.uk/blog/2025/05/o2-expose-customer-location-call-4g/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://news.ycombinator.com/item?id=44014046"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://www.etsi.org/deliver/etsi_ts/124200_124299/124229/15.10.00_60/ts_124229v151000p.pdf"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://www.ispreview.co.uk/index.php/2025/05/o2-uk-fixes-volte-flaw-that-exposed-user-mobile-location-data.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-201"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    }
  ]
}