CWE-1253 — Vulnerability Class 1

CWE-1253 is a hardware security weakness where developers incorrectly select fuse values, compromising the integrity of secure system states. This vulnerability typically arises when security logic depends on a fuse remaining unblown to indicate a secure configuration, yet the implementation fails to properly account for the irreversible nature of blown fuses. Attackers may exploit this by manipulating the physical state of the fuse or bypassing the hardware checks, effectively forcing the system into an insecure mode or exposing sensitive configuration data stored within the fuse structure. To mitigate this risk, developers must rigorously validate fuse selection during the design phase, ensuring that critical security mechanisms do not rely solely on the initial state of one-time programmable memory. Implementing redundant hardware checks and utilizing tamper-resistant packaging further strengthens the system against physical tampering and unauthorized state changes.