CVE-2022-3864

CVE-2022-3864 is a medium-severity vulnerability affecting Hitachi Energy Relion 650, 670, and SAM600-IO devices. It stems from insufficient signature validation in the update package, allowing an authenticated attacker to install a tampered update. Successful exploitation leads to a temporary denial of service as the device restarts, but it returns to normal operation afterward. The CVSS score is 4.5, indicating a network-based attack with high privileges required and low attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.