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CVE-2026-6581— H3C Magic B1 aspForm SetMobileAPInfoById buffer overflow

Quick assessment

Affected
H3C Magic B1
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

H3C Magic B1是中国新华三（H3C）公司的一款无线路由器。 H3C Magic B1 100R004及之前版本存在安全漏洞，该漏洞源于对文件/goform/aspForm中参数param的操作导致缓冲区溢出，可能导致远程攻击。

CVSS 8.8 · High EPSS 0.45% · P39
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I. Basic Information for CVE-2026-6581

Vulnerability Information
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Vulnerability Title
H3C Magic B1 aspForm SetMobileAPInfoById buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in H3C Magic B1 up to 100R004. Affected by this vulnerability is the function SetMobileAPInfoById of the file /goform/aspForm. Performing a manipulation of the argument param results in buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
H3C Magic B1 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
H3C Magic B1是中国新华三（H3C）公司的一款无线路由器。 H3C Magic B1 100R004及之前版本存在安全漏洞，该漏洞源于对文件/goform/aspForm中参数param的操作导致缓冲区溢出，可能导致远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
H3C Magic B1 100R004 -

II. Public POCs for CVE-2026-6581

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III. Intelligence Information for CVE-2026-6581

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Vendor Advisories for CVE-2026-6581 (1)

Other References for CVE-2026-6581 (1)

Same Patch Batch · H3C · 2026-04-19 · 3 CVEs total

CVE-2026-6563 8.8 HIGH H3C Magic B1 aspForm SetAPWifiorLedInfoById buffer overflow
CVE-2026-6560 8.8 HIGH H3C Magic B0 aspForm Edit_BasicSSID buffer overflow

IV. Related Vulnerabilities

Same product: Magic B1
Same vendor: H3C
Same weakness: CWE-120