CVE-2026-40003

USB-based arbitrary memory write vulnerability in ZTE ZX297520V3 soc BootROM

Published May 7, 2026 CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Zte zx297520v3
Zte zx297520v3 Firmware
CPEs cpe:2.3:h:zte:zx297520v3:-:*:*:*:*:*:*:*
cpe:2.3:o:zte:zx297520v3_firmware:-:*:*:*:*:*:*:*
Vendors & Products Zte zx297520v3
Zte zx297520v3 Firmware
Type Values Removed Values Added
First Time appeared Zte
Zte zx297520v3 Bootrom
Vendors & Products Zte
Zte zx297520v3 Bootrom
Type Values Removed Values 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.
Title USB-based arbitrary memory write vulnerability in ZTE ZX297520V3 soc BootROM
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
zte
Published
Updated
May 19, 2026, 5:18 PM
Reserved
Apr 8, 2026, 7:51 AM
Status
Analyzed
Published
May 7, 2026, 2:16 AM
Modified
Oct 26, 2026, 7:10 PM