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CVE-2025-9046— Tenda AC20 setMacFilterCfg sub_46A2AC stack-based overflow

Quick assessment

Affected
Tenda AC20
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.

Tenda AC20是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC20 16.03.08.12版本存在安全漏洞，该漏洞源于/goform/setMacFilterCfg文件中sub_46A2AC函数对参数deviceList处理不当导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 0.82% · P56

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-9046

Vulnerability Information
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Vulnerability Title
Tenda AC20 setMacFilterCfg sub_46A2AC stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in Tenda AC20 16.03.08.12. This issue affects the function sub_46A2AC of the file /goform/setMacFilterCfg. The manipulation of the argument deviceList leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
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 AC20 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC20是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC20 16.03.08.12版本存在安全漏洞，该漏洞源于/goform/setMacFilterCfg文件中sub_46A2AC函数对参数deviceList处理不当导致栈缓冲区溢出。
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

Vendor Product Affected Versions CPE Subscribe
Tenda AC20 16.03.08.12 -

II. Public POCs for CVE-2025-9046

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8772 chars
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III. Intelligence Information for CVE-2025-9046

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Vendor Advisories for CVE-2025-9046 (1)

Security Blog Posts for CVE-2025-9046 (1)

Same Patch Batch · Tenda · 2025-08-15 · 4 CVEs total

CVE-2025-9023 8.8 HIGH Tenda AC7/AC18 SetLEDCfg formSetSchedLed buffer overflow
CVE-2025-9007 8.8 HIGH Tenda CH22 editFileName formeditFileName buffer overflow
CVE-2025-9006 8.8 HIGH Tenda CH22 delFileName formdelFileName buffer overflow

IV. Related Vulnerabilities

Same product: AC20
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2025-9046

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