Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-4648 in CasfID NFC wristbands allows attackers to exploit weak encryption, potentially leading to unauthorized access and financial losses. https://ift.tt/EKaAdc3
Post summary
The message confirms CVE-2026-4648 exists in CasfID NFC wristbands and highlights weak encryption leading to unauthorized access, but it does not provide actionable details such as PoC, exploit code, or patch information.