# CVE-2025-70994

> Vulnerability · severity: **HIGH** (CVSS 7.3).

## 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.

## Key facts

- **CVE ID:** CVE-2025-70994
- **Published:** 2026-04-23
- **CVSS severity:** HIGH
- **CVSS base score:** 7.3
- **CWE codes:** CWE-1390

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-70994

## Citation

> AI Analytics. CVE-2025-70994. Retrieved 2026-07-25 from https://api.ai-analytics.org/cve/CVE-2025-70994. Derived from NIST NVD. Licensed CC0.

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