cvedb.io
CVE-2021-33881
MEDIUM · CVSS 4.2
EPSS exploitation probability: 0%
Published 2021-06-06T16:15:07.407 · Last modified 2026-06-17T03:55:19.630

Summary

On NXP MIFARE Ultralight and NTAG cards, an attacker can interrupt a write operation (aka conduct a "tear off" attack) over RFID to bypass a Monotonic Counter protection mechanism. The impact depends on how the anti tear-off feature is used in specific applications such as public transportation, physical access control, etc.

Affected products

nxp — mifare_ultralight_ev1_firmware

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.