CVE-2026-3678— Tenda FH451 AdvSetWan sub_3C434 stack-based overflow
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-3678
Vulnerability Information
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Vulnerability Title
Tenda FH451 AdvSetWan sub_3C434 stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Tenda FH451 1.0.0.9. Affected is the function sub_3C434 of the file /goform/AdvSetWan. This manipulation of the argument wanmode/PPPOEPassword causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
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
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda FH451 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda FH451是中国腾达（Tenda）公司的一款路由器。 Tenda FH451 1.0.0.9版本存在安全漏洞，该漏洞源于对文件/goform/AdvSetWan中参数wanmode/PPPOEPassword的错误操作，可能导致栈缓冲区溢出。
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
II. Public POCs for CVE-2026-3678
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8745 chars
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III. Intelligence Information for CVE-2026-3678
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Vendor Advisories for CVE-2026-3678 (2)
- Submit #765330: Tenda FH451 V1.0.0.9 Stack-based Buffer Overflowthird-party-advisory
Other References for CVE-2026-3678 (1)
- Too many requests · GitHubexploit
Same Patch Batch · Tenda · 2026-03-07 · 3 CVEs total
| CVE-2026-3677 | 8.8 HIGH | Tenda FH451 setcfm fromSetCfm stack-based overflow |
| CVE-2026-3679 | 8.8 HIGH | Tenda FH451 QuickIndex formQuickIndex stack-based overflow |
IV. Related Vulnerabilities
Same product: FH451
- CVE-2026-4535
Tenda FH451 WrlclientSet stack-based overflow - CVE-2026-4534
Tenda FH451 WrlExtraSet formWrlExtraSet stack-based overflow - CVE-2026-3679
Tenda FH451 QuickIndex formQuickIndex stack-based overflow - CVE-2026-3677
Tenda FH451 setcfm fromSetCfm stack-based overflow - CVE-2026-2911
Tenda FH451 GstDhcpSetSer buffer overflow
Same vendor: Tenda
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Same weakness: CWE-121
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V. Comments for CVE-2026-3678
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