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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.

PUBLISHED Reserved 2026-05-17 | Published 2026-05-17 | Updated 2026-05-18 | Assigner VulDB




HIGH: 8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 7.2CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
8.3AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Buffer Overflow

Memory Corruption

Product status

100R002
affected

Timeline

2026-05-17:Advisory disclosed
2026-05-17:VulDB entry created
2026-05-17:VulDB entry last update

Credits

yyy0032 (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/364389 (VDB-364389 | H3C Magic B3 aspForm UpdateWanParams buffer overflow) vdb-entry technical-description

vuldb.com/vuln/364389/cti (VDB-364389 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/811373 (Submit #811373 | New H3C Technologies Co., Ltd. H3C Magic B3 <= 100R002 Buffer Overflow) third-party-advisory

github.com/yyyy0031/CVE/issues/1 exploit issue-tracking

cve.org (CVE-2026-8764)

nvd.nist.gov (CVE-2026-8764)

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