Arbitrary Memory Write Vulnerability in ZTE ZX297520V3 BootROM

CVE-2026-40003

What is CVE-2026-40003?

The ZTE ZX297520V3 BootROM is susceptible to an arbitrary memory write vulnerability that can be exploited via USB. This weakness stems from the lack of proper validation for target addresses during USB download mode, allowing attackers to manipulate memory locations within the BootROM runtime. By writing data to any designated memory location, attackers can overwrite the stack, potentially hijacking execution flow and circumventing Secure Boot's signature verification. This puts the affected systems at significant risk of unauthorized code execution and further compromises system integrity.

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