CVE-2026-40003
USB-based arbitrary memory write vulnerability in ZTE ZX297520V3 soc BootROM
MEDIUM 6.8EPSS 0.3%
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.
- Affected
- ZTE · ZX297520V3 BootROM
- CVSS v3.1 NVD
- 6.8 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1 ZTE
- 5.1 MEDIUM
CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L - EPSS
- 0.25% chance of exploitation in the next 30 days, 16th percentile
- Published
- 2026-05-07
- Updated
- 2026-05-19
Proof-of-concept exploits (1)
- rva3/CVE-2026-4000316★ · 2026-05-07