CVE-2025-48219

Description

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.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.03%
Affected: O2 UK O2
Published at:
Updated at:

References

Link Tags
https://mastdatabase.co.uk/blog/2025/05/o2-expose-customer-location-call-4g/
https://news.ycombinator.com/item?id=44014046
https://www.etsi.org/deliver/etsi_ts/124200_124299/124229/15.10.00_60/ts_124229v151000p.pdf
https://www.ispreview.co.uk/index.php/2025/05/o2-uk-fixes-volte-flaw-that-exposed-user-mobile-location-data.html

Frequently Asked Questions

What is the severity of CVE-2025-48219?
CVE-2025-48219 has been scored as a low severity vulnerability.
How to fix CVE-2025-48219?
To fix CVE-2025-48219, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-48219 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-48219 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-48219?
CVE-2025-48219 affects O2 UK O2.
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