🛡️ CVE-2026-40003 — zx297520v3-firmware

🟡 CVSS 5.1 — Medium ✅ No Known Exploit NVD
5.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached with physical access to the device, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity high, availability low.

Affected software

CVE-2026-40003 is recorded against 2 packages.

  • unknown
  • zx297520v3-firmware

Timeline and source

Published on 7 May 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

support.zte.com.cn

Details

Severity Medium
CVSS Score 5.1
CVSS Vector CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-07
Updated 2026-08-11
Modified N/A
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —
zx297520v3-firmware — —

Similar Threats

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