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

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-17 · updated 2026-10-26
Weakness: CWE-119

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.

Affected products

H3C Magic B3: 100R002

References

https://github.com/yyyy0031/CVE/issues/1
https://vuldb.com/submit/811373
https://vuldb.com/vuln/364389
https://vuldb.com/vuln/364389/cti

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