ktauchathuranga/CVE-2025-70994

ktauchathuranga/CVE-2025-70994

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Security Advisory & PoC for CVE-2025-70994 (Yadea T5 CWE-1390). Details on EV1527 RF replay vulnerabilities, coordinated with CISA.
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CVE History

CVEPublishedCVSS v3CVSS v2
CVE-2025-70994↗
7.3 HIGH—

Yadea T5 Electric Bicycles (models manufactured in/after 2024) have a weak authentication mechanism in their keyless entry system. The system utilizes the EV1527 fixed-code RF protocol without implementing rolling codes or cryptographic challenge-response mechanisms. This is vulnerable to signal forgery after a local attacker intercepts any legitimate key fob transmission, allowing for complete unauthorized vehicle operation via a replay attack.