CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 4.2. See the original NVD description below for full technical details.
CVE
CVE-2021-33881
Severity
MEDIUM
CVSS
4.2
EPSS
0.41%
Original NVD 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.
Related CVEs
Other vulnerabilities affecting the same vendor(s)