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CVE-2026-9393— H3C Magic B0 aspForm Edit_BasicSSID_5G buffer overflow

Quick assessment

Affected
H3C Magic B0
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

H3C Magic B0是中国新华三（H3C）公司的一款小型无线路由器。 H3C Magic B0 100R002及之前版本存在安全漏洞，该漏洞源于文件/goform/aspForm中函数Edit_BasicSSID_5G的参数param操作不当，可能导致远程缓冲区溢出攻击。

CVSS 8.8 · High EPSS 0.45% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
H3C Magic B0 100R002 affected
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I. Basic Information for CVE-2026-9393

Vulnerability Information
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Vulnerability Title
H3C Magic B0 aspForm Edit_BasicSSID_5G buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in H3C Magic B0 up to 100R002. This affects the function Edit_BasicSSID_5G of the file /goform/aspForm. Performing a manipulation of the argument param results in buffer overflow. The attack may be initiated remotely. The exploit has been made public and could 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 B0 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
H3C Magic B0是中国新华三（H3C）公司的一款小型无线路由器。 H3C Magic B0 100R002及之前版本存在安全漏洞，该漏洞源于文件/goform/aspForm中函数Edit_BasicSSID_5G的参数param操作不当，可能导致远程缓冲区溢出攻击。
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 B0 100R002 cpe:2.3:a:h3c:magic_b0:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9393

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10945 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-9393

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Other References for CVE-2026-9393 (1)

IV. Related Vulnerabilities

Same product: Magic B0
Same vendor: H3C
Same weakness: CWE-120