CVE-2026-40003
USB-based arbitrary memory write vulnerability in ZTE ZX297520V3 soc BootROM
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.
INFO
Published Date :
May 7, 2026, 2:16 a.m.
Last Modified :
May 7, 2026, 2:16 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-40003
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 6786b568-6808-4982-b61f-398b0d9679eb | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Validate target addresses in USB download mode.
- Patch BootROM to fix memory write vulnerability.
- Update device firmware to the latest version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40003.
| URL | Resource |
|---|---|
| https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2144487415169560645 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40003 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40003
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40003 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40003 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
May. 07, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L Added CWE CWE-787 Added Reference https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2144487415169560645