VulnerabilityAnalyzed
CVE-2026-40003
ZTE ZX297520V3 BootROM contains a vulnerability that allows arbitrary memory writes via USB.
MEDIUM 6.8EPSS 0.30%
Does this matter?
Lower severity and a low EPSS score (0.30%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.8 MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.30% probability · 22th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- zte/zx297520v3 firmware
- Source
- psirt@zte.com.cn
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.