CVE-2025-4053: Unauthorized creation of master key in Mifare Classic Be-Tech cards

Severity: medium (CVSS 6.8 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-26 · updated 2026-06-17
Weakness: CWE-312

Description

The data stored in Be-Tech Mifare Classic card is stored in cleartext. An attacker having access to a Be-Tech hotel guest Mifare Classic card can create a master key card that unlocks all the locks in the building. This issue affects all Be-Tech Mifare Classic card systems. To fix the vulnerability, it is necessary to replace the software, encoder, cards, and PCBs in the locks.

Affected products

Be-Tech Mifare Classic cards: all versions

References

https://cert.pl/en/posts/2025/05/CVE-2025-4053/

Get alerted when CVE-2025-4053 or the next vulnerability affects your stack