CVE-2025-70994
Yadea T5 Electric Bicycles (models manufactured in/after 2024) have a weak authentication mechanism in their keyless entry system. The system utilizes the...
- Published
- Apr 23, 2026
- Updated
- Apr 23, 2026
- Assigning CNA
- mitre
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:HLow · next 30 days
- Percentile
- 20.1%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1Passive RF signal analyzer for EV1527 fixed-code protocol, demonstrating CVE-2025-70994 replay vulnerability in Yadea T5 keyless entry systems. Includes PoC code for ESP8266/CC1101.
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