CVE-2026-40003

medium

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.

References

https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2144487415169560645

Details

Source: Mitre, NVD

Published: 2026-05-07

Updated: 2026-05-07

Risk Information

CVSS v2

Base Score: 5.2

Vector: CVSS2#AV:L/AC:H/Au:N/C:P/I:C/A:P

Severity: Medium

CVSS v3

Base Score: 5.1

Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L

Severity: Medium

EPSS

EPSS: 0.00017