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CVE-2025-7420— Tenda O3V2 httpd setWrlBasicInfo formWifiBasicSet stack-based overflow

Quick assessment

Affected
Tenda O3V2
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 O3V2是中国腾达（Tenda）公司的一款室外无线网桥。 Tenda O3V2 1.0.0.12(3880)版本存在安全漏洞，该漏洞源于文件/goform/setWrlBasicInfo中参数extChannel的操作可能导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 0.78% · P53
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I. Basic Information for CVE-2025-7420

Vulnerability Information
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Vulnerability Title
Tenda O3V2 httpd setWrlBasicInfo formWifiBasicSet stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been declared as critical. This vulnerability affects the function formWifiBasicSet of the file /goform/setWrlBasicInfo of the component httpd. The manipulation of the argument extChannel leads to stack-based buffer overflow. The attack can 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 O3V2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda O3V2是中国腾达（Tenda）公司的一款室外无线网桥。 Tenda O3V2 1.0.0.12(3880)版本存在安全漏洞，该漏洞源于文件/goform/setWrlBasicInfo中参数extChannel的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 O3V2 1.0.0.12(3880) -

II. Public POCs for CVE-2025-7420

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9567 chars
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III. Intelligence Information for CVE-2025-7420

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Proof of Concept for CVE-2025-7420 (1)

Security Blog Posts for CVE-2025-7420 (1)

Same Patch Batch · Tenda · 2025-07-10 · 7 CVEs total

CVE-2025-7416 8.8 HIGH Tenda O3V2 httpd setSysTimeInfo fromSysToolTime stack-based overflow
CVE-2025-7417 8.8 HIGH Tenda O3V2 httpd setPingInfo fromNetToolGet stack-based overflow
CVE-2025-7418 8.8 HIGH Tenda O3V2 httpd setPing fromPingResultGet stack-based overflow
CVE-2025-7419 8.8 HIGH Tenda O3V2 httpd setRateTest fromSpeedTestSet stack-based overflow
CVE-2025-7414 6.3 MEDIUM Tenda O3V2 httpd setPingInfo fromNetToolGet os command injection
CVE-2025-7415 6.3 MEDIUM Tenda O3V2 httpd getTraceroute fromTraceroutGet command injection

IV. Related Vulnerabilities

Same product: O3V2
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2025-7420

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