CVE-2025-70994 Weak cryptography in n/a
Attackers can replay intercepted key fob signals to bypass authentication and operate Yadea T5 electric bicycles without authorization.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-70994?
CVE-2025-70994 is a high-severity vulnerability in n/a, published on 23 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-1390
Which versions are affected by CVE-2025-70994?
How do I fix CVE-2025-70994?
No fix has been published for CVE-2025-70994 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-70994 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-70994 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-4cpv-8qgx-f9fv.