The Huawei Mobile Broadband HL Service 22.001.25.00.03 and earlier uses a weak ACL for the MobileBrServ program data directory, which allows local users to gain SYSTEM privileges by modifying VERSION.dll.
Huawei Mobile Broadband HL Service versions 22.001.25.00.03 and below are vulnerable to a DLL side loading attack allowing normal unprivileged users to gain full SYSTEM access.