CVE-2026-8764H3C Magic B3 aspForm UpdateWanParams buffer overflow

Description

A security vulnerability has been detected 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. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• VDB-364389 | H3C Magic B3 aspForm UpdateWanParams buffer overflow vdb-entrytechnical-description
• VDB-364389 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
• Submit #811373 | New H3C Technologies Co., Ltd. H3C Magic B3 <= 100R002 Buffer Overflow third-party-advisory
• https://github.com/yyyy0031/CVE/issues/1 exploitissue-tracking