Vulnerability in Freebox Mini 4k
CVE-2025-63292
Freebox v5 HD (firmware = 1.7.20), Freebox v5 Crystal (firmware = 1.7.20), Freebox v6 Révolution r1–r3 (firmware = 4.7.x), Freebox Mini 4K (firmware = 4.7.x), and Freebox One (firmware = 4.7.x) were discovered to expose subscribers' IMSI identifiers in plaintext during the initial phase of EAP-SIM authentication over the `FreeWifi_secure` network. During the EAP-Response/Identity exchange, the subscriber's full Network Access Identifier (NAI), which embeds the raw IMSI, is transmitted without encryption, tunneling, or pseudonymization. An attacker located within Wi-Fi range (~100 meters) can passively capture these frames without requiring user interaction or elevated privileges. The disclosed IMSI enables device tracking, subscriber correlation, and long-term monitoring of user presence near any broadcasting Freebox device. The vendor acknowledged the vulnerability, and the `FreeWifi_secure` service is planned for full deactivation by 1 October 2025.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.001 (1.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
References
- gist.github.com/7h30th3r0n3/1a0fadb19f1528e3d3f6bad9f680c3b0 (Exploit, Third Party Advisory)
- 7h30th3r0n3.fr/the-vulnerability-that-killed-freewifi_secure/ (Broken Link)
Frequently asked questions
- What is CVE-2025-63292?
- CVE-2025-63292 is a low-severity vulnerability in Freebox Mini 4k, classified under Cleartext Transmission of Sensitive Information. CVSS score: 3.5/10. Published 2025-11-17.
- How severe is CVE-2025-63292?
- Low severity. CVSS v3 base score is 3.5 out of 10.