A vulnerability labeled as critical has been found in H3C Magic B3 up to 100R002 . This affects the function UpdateWanParams of the file /goform/aspForm . Such manipulation of the argument param leads to buffer overflow. This vulnerability is listed as CVE-2026-8764 . The attack may be performed from remote. In addition, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.