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2 vulnerabilities by CasfID Servicios Tecnológicos
CVE-2026-4648 (GCVE-0-2026-4648)
Vulnerability from nvd – Published: 2026-07-28 11:41 – Updated: 2026-07-28 12:04
VLAI
EPSS
VEX
Title
Insufficient Encryption Level in CasfID Servicios Tecnológicos NFC Wristbands
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 12:04 UTC
CWE
- CWE-326 - Inadequate Encryption Strength
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CasfID Servicios Tecnológicos | NFC Wristbands |
Affected:
FM11RF08S variant
(custom)
|
Date Public
2026-07-28 11:31
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CVE-2026-4648 (GCVE-0-2026-4648)
Vulnerability from cvelistv5 – Published: 2026-07-28 11:41 – Updated: 2026-07-28 12:04
VLAI
EPSS
VEX
Title
Insufficient Encryption Level in CasfID Servicios Tecnológicos NFC Wristbands
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 12:04 UTC
CWE
- CWE-326 - Inadequate Encryption Strength
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CasfID Servicios Tecnológicos | NFC Wristbands |
Affected:
FM11RF08S variant
(custom)
|
Date Public
2026-07-28 11:31
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