CVE-2026-40003 (GCVE-0-2026-40003)
Vulnerability from cvelistv5 – Published: 2026-05-07 01:15 – Updated: 2026-05-07 01:15
VLAI?
Title
USB-based arbitrary memory write vulnerability in ZTE ZX297520V3 soc BootROM
Summary
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.
Severity ?
5.1 (Medium)
CWE
- CWE-787 - Out-of-bounds write
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ZTE | ZX297520V3 BootROM |
Affected:
7520V3 chip
|
Credits
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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