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CVE-2026-2930— Tenda A18 Httpd Service UploadCfg webCgiGetUploadFile stack-based overflow

Quick assessment

Affected
Tenda A18
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.

Tenda A18是中国腾达（Tenda）公司的一款 AC1200 双频 Wi-Fi 中继器。 Tenda A18 15.13.07.13版本存在安全漏洞，该漏洞源于对文件/cgi-bin/UploadCfg中参数boundary的错误操作，可能导致栈缓冲区溢出。

CVSS 6.3 · Medium EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-2930

Vulnerability Information
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Vulnerability Title
Tenda A18 Httpd Service UploadCfg webCgiGetUploadFile stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in Tenda A18 15.13.07.13. The affected element is the function webCgiGetUploadFile of the file /cgi-bin/UploadCfg of the component Httpd Service. Such manipulation of the argument boundary leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda A18 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda A18是中国腾达（Tenda）公司的一款 AC1200 双频 Wi-Fi 中继器。 Tenda A18 15.13.07.13版本存在安全漏洞，该漏洞源于对文件/cgi-bin/UploadCfg中参数boundary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

Vendor Product Affected Versions CPE Subscribe
Tenda A18 15.13.07.13 -

II. Public POCs for CVE-2026-2930

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III. Intelligence Information for CVE-2026-2930

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Vendor Advisories for CVE-2026-2930 (1)

Same Patch Batch · Tenda · 2026-02-22 · 8 CVEs total

CVE-2026-2911 8.8 HIGH Tenda FH451 GstDhcpSetSer buffer overflow
CVE-2026-2910 8.8 HIGH Tenda HG9 formPing6 stack-based overflow
CVE-2026-2909 8.8 HIGH Tenda HG9 Diagnostic Ping Endpoint formPing stack-based overflow
CVE-2026-2908 8.8 HIGH Tenda HG9 Loopback Detection Configuration Endpoint formLoopBack stack-based overflow
CVE-2026-2907 8.8 HIGH Tenda HG9 GPON Configuration Endpoint formgponConf stack-based overflow
CVE-2026-2906 8.8 HIGH Tenda HG9 Samba Configuration Endpoint formSamba stack-based overflow
CVE-2026-2905 8.8 HIGH Tenda HG9 Wireless Configuration Endpoint formWlanSetup stack-based overflow

IV. Related Vulnerabilities

Same product: A18
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-2930

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