CVE-2026-40003

Severity CVSS v4.0:

Pending analysis

Type:

CWE-787 Out-of-bounds Write

Publication date:

07/05/2026

Last modified:

13/05/2026

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.

Impact

Vector 3.x

CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L CVSS v3.1 Severity and Metrics:

Base Score: 5.10 MEDIUM
Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L

Attack Vector (AV): Physical
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): High
Availability (A): Low

Base Score 3.x

5.10

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:zte:zx297520v3_firmware:-:::::::*
cpe:2.3:h:zte:zx297520v3:-:::::::*

To consult the complete list of CPE names with products and versions, see this page

References to Advisories, Solutions, and Tools

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