CVE-2021-33881

MediumCVSS 4.2/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 4.2/10CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-863

Affected software

No affected versions have been published.

Timeline

Published: Jun 6, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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