CVE-2025-48219

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. Limited direct impact.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2025-05-18 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 09:29 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.3% in the next 30 days (EPSS).
• Severity: 3.5 LOW (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2025-05-18 15:15 UTC

Last modified

2026-06-17 09:29 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-201

Record status

Deferred

Attack profile CVSS 3.1 · 3.5

Attack vector

Network

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-48219.md and follow it. Check whether this project is affected by CVE-2025-48219. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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