If you cannot find an official firmware source, assume none exists. Many “firmware updates” for this model online are malicious or for different sub-versions. When in doubt, leave it as-is or upgrade your hardware.
: This flaw has been extensively exploited by botnets like Satori , Okiku , and more recently, the Murdoc and Nexcorium variants in 2024–2025 to launch large-scale DDoS attacks. huawei hg532n firmware update