CVE-2025-48219 – O2 UK IMS E-UTRAN Cell Identity Leak

The following table lists the changes that have been made to the
CVE-2025-48219 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    May. 18, 2025

    Action Type Old Value New Value
    Added Tag exclusively-hosted-service
    Added Description O2 UK through 2025-05-17 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.
    Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
    Added CWE CWE-201
    Added Reference https://mastdatabase.co.uk/blog/2025/05/o2-expose-customer-location-call-4g/
    Added Reference https://news.ycombinator.com/item?id=44014046
    Added Reference https://www.etsi.org/deliver/etsi_ts/124200_124299/124229/15.10.00_60/ts_124229v151000p.pdf
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