CVE-2025-48219

O2 UK through 2025-05-17 allows subscribers to determine the Cell ID of other subscribers by...

3.5 Low

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.34%Up 0.3 points since May 19, 2025

What each source reports

CVE List Score used 3.5

Record: CVE-2025-48219
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Weakness: CWE-201
Updated: 2026-11-02

EUVDEUVD-2025-15631 3.5

Record: EUVD-2025-15631
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-7rcm-4jcj-r4q6 3.5

O2 UK through 2025-05-17 allows subscribers to determine the Cell ID of other subscribers by...

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.

Record: GHSA-7rcm-4jcj-r4q6
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Weakness: CWE-201
Updated: 2026-11-02

NVD 3.5

Record: CVE-2025-48219
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Weakness: CWE-201
Updated: 2026-11-02

Affected products

o2 uk o2

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-48219 is a low vulnerability (CVSS 3.5) in O2 Uk O2, published May 18, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.34%, the 27th percentile. No source names a fixed version.