CVE-2026-40003EPSS p22.1%

CVE-2026-40003CVE-2026-40003

zte / zx297520v3_firmware

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.

Scoring

CVSS 5.1 ()
VectorCVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
EPSS0.30% probability of exploitation · percentile 22.1% · 2026-10-27T12:03:15Z
Last modified2026-10-26
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.