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CVE-2025-11121— Tenda AC18 AdvSetLanip command injection

Quick assessment

Affected
Tenda AC18
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 AC18是中国腾达（Tenda）公司的一款路由器。 Tenda AC18 15.03.05.19版本存在命令注入漏洞，该漏洞源于对文件/goform/AdvSetLanip中参数lanIp的错误操作，可能导致远程命令注入攻击。

CVSS 6.3 · Medium EPSS 3.74% · P89
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I. Basic Information for CVE-2025-11121

Vulnerability Information
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Vulnerability Title
Tenda AC18 AdvSetLanip command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in Tenda AC18 15.03.05.19. The impacted element is an unknown function of the file /goform/AdvSetLanip. The manipulation of the argument lanIp leads to command injection. The attack can be initiated remotely. The exploit has been disclosed publicly 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:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda AC18 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC18是中国腾达（Tenda）公司的一款路由器。 Tenda AC18 15.03.05.19版本存在命令注入漏洞，该漏洞源于对文件/goform/AdvSetLanip中参数lanIp的错误操作，可能导致远程命令注入攻击。
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
Tenda AC18 15.03.05.19 -

II. Public POCs for CVE-2025-11121

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III. Intelligence Information for CVE-2025-11121

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Proof of Concept for CVE-2025-11121 (1)

Same Patch Batch · Tenda · 2025-09-28 · 6 CVEs total

CVE-2025-11123 8.8 HIGH Tenda AC18 saveAutoQos stack-based overflow
CVE-2025-11122 8.8 HIGH Tenda AC18 WizardHandle stack-based overflow
CVE-2025-11120 8.8 HIGH Tenda AC8 SetServerConfig formSetServerConfig buffer overflow
CVE-2025-11117 8.8 HIGH Tenda CH22 GstDhcpSetSer formWrlExtraGet buffer overflow
CVE-2025-11091 8.8 HIGH Tenda AC21 SetStaticRouteCfg sscanf buffer overflow

IV. Related Vulnerabilities

Same product: AC18
Same vendor: Tenda
Same weakness: CWE-77

V. Comments for CVE-2025-11121

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