Adjacent IMSI disclosure via plaintext EAP identity
Published Nov 17, 2025 · Updated Nov 18, 2025
Information disclosure in affected Freebox firmware allows physically proximate attackers to capture subscriber IMSIs over Wi-Fi. The FreeWifi_secure EAP-SIM flow sends the full Network Access Identifier, containing the raw IMSI, in an unencrypted EAP-Response/Identity before establishing a protected tunnel. Passive monitoring within Wi-Fi range during device association is sufficient, enabling subscriber correlation, device tracking, and long-term presence monitoring without modifying traffic.
Summary
What happened
Information disclosure in affected Freebox firmware allows physically proximate attackers to capture subscriber IMSIs over Wi-Fi. The FreeWifi_secure EAP-SIM flow sends the full Network Access Identifier, containing the raw IMSI, in an unencrypted EAP-Response/Identity before establishing a protected tunnel. Passive monitoring within Wi-Fi range during device association is sufficient, enabling subscriber correlation, device tracking, and long-term presence monitoring without modifying traffic.
The record
- CVE
- CVE-2025-63292
- Published
- Nov 17, 2025
- Updated
- Nov 18, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-319, T1040
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 17, 2025CVE publishedPublication date reported by the CVE source.
- Nov 18, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- FreeWifi_secure IMSI capture proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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