There is no single "proper" universal firmware for the HG532e. You must get the version specific to your Internet Service Provider. If your ISP no longer supports this router, the most secure action is to replace the router (it is an insecure, legacy device).
Based on your query, you are likely looking for the for the Huawei HG532e router. hg532e firmware
Here is the critical information you need before downloading: There is no single "proper" universal firmware for