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CVE-2025-3820— Tenda W12/i24 httpd cgiSysUplinkCheckSet stack-based overflow

Quick assessment

Affected
Tenda W12
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tenda i24和Tenda W12都是中国腾达（Tenda）公司的产品。Tenda i24是一款无线路由器。Tenda W12是一款高性能无线接入点。 Tenda i24和Tenda W12 3.0.0.4(2887)/3.0.0.5(3644)版本存在安全漏洞，该漏洞源于对文件/bin/httpd中参数hostIp1/hostIp2的错误操作导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 10.98% · P96
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I. Basic Information for CVE-2025-3820

Vulnerability Information
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Vulnerability Title
Tenda W12/i24 httpd cgiSysUplinkCheckSet stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Tenda W12 and i24 3.0.0.4(2887)/3.0.0.5(3644) and classified as critical. Affected by this issue is the function cgiSysUplinkCheckSet of the file /bin/httpd. The manipulation of the argument hostIp1/hostIp2 leads to stack-based buffer overflow. The attack may be launched 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 i24和Tenda W12 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda i24和Tenda W12都是中国腾达（Tenda）公司的产品。Tenda i24是一款无线路由器。Tenda W12是一款高性能无线接入点。 Tenda i24和Tenda W12 3.0.0.4(2887)/3.0.0.5(3644)版本存在安全漏洞，该漏洞源于对文件/bin/httpd中参数hostIp1/hostIp2的错误操作导致栈缓冲区溢出。
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 W12 3.0.0.4(2887) -
Tenda i24 3.0.0.4(2887) -

II. Public POCs for CVE-2025-3820

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III. Intelligence Information for CVE-2025-3820

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Vendor Advisories for CVE-2025-3820 (2)

Proof of Concept for CVE-2025-3820 (1)

Same Patch Batch · Tenda · 2025-04-19 · 3 CVEs total

CVE-2025-3803 8.8 HIGH Tenda W12/i24 httpd cgiSysScheduleRebootSet stack-based overflow
CVE-2025-3802 8.8 HIGH Tenda W12/i24 httpd cgiPingSet stack-based overflow

IV. Related Vulnerabilities

Same product: W12
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2025-3820

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