VULNERABILITY INTELLIGENCE

CVE-2026-40003

CVSS score5.1 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2026-05-07
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L

Description

ZTE ZX297520V3 BootROM contains a vulnerability that allows arbitrary memory writes via USB. Attackers can exploit the lack of target address validation in the USB download mode to write data to any location in BootROM runtime memory, thereby overwriting the stack, hijacking the execution flow, bypassing the Secure Boot signature verification mechanism, and achieving unauthorized code execution.

Weakness classification

  • psirt@zte.com.cn: CWE-787

Primary references