CVE-2026-4648Insufficient Encryption Level in CasfID Servicios Tecnológicos NFC Wristbands
Updated under an hour ago ()
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It affects CasfID Servicios Tecnológicos NFC Wristbands. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Use of an insecure cryptographic algorithm in the cashless payment system using NFC wristbands from CasfID Servicios Tecnológicos S.L.U. (version used at Resurrection Fest 2025), which employs cards based on MIFARE Classic technology (FM11RF08S). The cryptographic weakness of the authentication algorithm allows an attacker to retrieve access keys using techniques known as Backdoored Nested Attack, read the wristband’s entire contents, and clone its credentials onto a compatible rewritable card. Exploitation of this vulnerability could enable the impersonation of other attendees, the fraudulent use of the balance associated with their wristbands, and financial losses for both the affected users and the event organizers.
- CVSS
- 6.8 MEDIUM (v4.0, CNA)CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-326
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- INCIBE
- NVD analysis
- Deferred
- Record last updated
- Jul 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
CasfID Servicios Tecnológicos NFC Wristbands casfid_servicios_tecnologicos:nfc_wristbands (from the name) | FM11RF08S variant | CNA record |
References
- https://www.incibe.es/en/incibe-cert/notices/aviso/insufficient-encryption-level-casfid-servicios-tecnologicos-nfc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.