In the course of this work, the public tool edl (B. Kerler, V3.62) was used, along with modifications based on it.

Experimental testbed:
To test the hypothesis of CVE-2026-25262 applicability to the SM8450 platform, an experimental tool cve_final_single was created on top of edl. It modifies the stage of loading the programmer into the device’s memory, allowing verification of the possibility of writing data to SRAM while bypassing signature verification.

Helper utilities:

• edl_debug — a modified version of edl for interacting with the device when the standard tool terminates with an error. It was used for debugging and gathering data on PBL behavior.
• extract_certs.py / deep_verify.py — tools for extracting and analyzing X.509 certificate chains from MELF/ELF files.

All tools were created for internal use for research purposes.