Summary
Successful exploitation of this vulnerability could result in an attacker being able to unlock and start the bicycle, leading to vehicle theft.
The following versions of Yadea T5 Electric Bicycle are affected:
- T5 Electric Bicycle vers:all/* (CVE-2025-70994)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 7.3 | Yadea | Yadea T5 Electric Bicycle | Weak Authentication |
Background
- Critical Infrastructure Sectors: Transportation Systems
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: China
Vulnerabilities
CVE-2025-70994
Yadea T5 Electric Bicycles have a weak authentication mechanism which is vulnerable to signal forgery after a local attacker intercepts any legitimate key fob transmissions.
Affected Products
Yadea T5 Electric Bicycle
Yadea
Yadea T5 Electric Bicycle: vers:all/*
known_affected
Remediations
Mitigation
Yadea did not respond to CISA’s attempts at coordination. Users of Yadea T5 Electric Bicycles are encouraged to keep their systems up to date and lock their property securely with external mechanisms. Users can contact Yadea at https://yadea.com/contact-us.
https://yadea.com/contact-us
Relevant CWE: CWE-1390 Weak Authentication
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 7.3 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H |
Acknowledgments
- Ashen Chathuranga reported this vulnerability to MITRE and CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.
Revision History
- Initial Release Date: 2026-04-23
| Date | Revision | Summary |
|---|---|---|
| 2026-04-23 | 1 | Initial Publication |