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I. Basic Information for CVE-2026-1637
Vulnerability Information
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Vulnerability Title
Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Tenda AC21 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC21是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC21 16.03.08.16版本存在安全漏洞，该漏洞源于文件/goform/AdvSetMacMtuWan中的函数fromAdvSetMacMtuWan存在栈缓冲区溢出。
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
VendorProductAffected VersionsCPESubscribe
TendaAC21 16.03.08.16 cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*
II. Public POCs for CVE-2026-1637
#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.5-35B-A3B-UD-Q4_K_XL.gguf · 7177 chars
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III. Intelligence Information for CVE-2026-1637
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IV. Related Vulnerabilities
Same product: AC21
Same vendor: Tenda
Same weakness: CWE-121
V. Comments for CVE-2026-1637

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