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CVE-2025-12209— Tenda O3 setDhcpConfig GetValue stack-based overflow

Quick assessment

Affected
Tenda O3
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 O3是中国腾达（Tenda）公司的一个室外无线网桥。 Tenda O3 1.0.0.10版本存在安全漏洞，该漏洞源于文件/goform/setDhcpConfig中函数SetValue/GetValue对参数dhcpEn的错误操作，可能导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 1.03% · P62

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-12209

Vulnerability Information
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Vulnerability Title
Tenda O3 setDhcpConfig GetValue stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Tenda O3 1.0.0.10(2478). Affected is the function SetValue/GetValue of the file /goform/setDhcpConfig. Executing a manipulation of the argument dhcpEn can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized.
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 O3 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda O3是中国腾达（Tenda）公司的一个室外无线网桥。 Tenda O3 1.0.0.10版本存在安全漏洞，该漏洞源于文件/goform/setDhcpConfig中函数SetValue/GetValue对参数dhcpEn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 O3 1.0.0.10(2478) cpe:2.3:o:tenda:o3_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2025-12209

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8394 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2025-12209

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Vendor Advisories for CVE-2025-12209 (2)

Proof of Concept for CVE-2025-12209 (1)

Same Patch Batch · Tenda · 2025-10-27 · 18 CVEs total

CVE-2025-12234 8.8 HIGH Tenda CH22 SafeMacFilter fromSafeMacFilter buffer overflow
CVE-2025-12322 8.8 HIGH Tenda CH22 NatStaticSetting fromNatStaticSetting buffer overflow
CVE-2025-12274 8.8 HIGH Tenda CH22 P2pListFilter fromP2pListFilter buffer overflow
CVE-2025-12273 8.8 HIGH Tenda CH22 webExcptypemanFilter fromwebExcptypemanFilter buffer overflow
CVE-2025-12272 8.8 HIGH Tenda CH22 addressNat fromAddressNat buffer overflow
CVE-2025-12271 8.8 HIGH Tenda CH22 RouteStatic fromRouteStatic buffer overflow
CVE-2025-12265 8.8 HIGH Tenda CH22 VirtualSer fromVirtualSer buffer overflow
CVE-2025-12236 8.8 HIGH Tenda CH22 DhcpListClient fromDhcpListClient buffer overflow
CVE-2025-12210 8.8 HIGH Tenda O3 AdvSetLanip GetValue stack-based overflow
CVE-2025-12233 8.8 HIGH Tenda CH22 SafeUrlFilter fromSafeUrlFilter buffer overflow
CVE-2025-12232 8.8 HIGH Tenda CH22 SafeClientFilter fromSafeClientFilter buffer overflow
CVE-2025-12225 8.8 HIGH Tenda AC6 HTTP Request WifiGuestSet stack-based overflow
CVE-2025-12214 8.8 HIGH Tenda O3 sysAutoReboot GetValue stack-based overflow
CVE-2025-12213 8.8 HIGH Tenda O3 setVlanConfig GetValue stack-based overflow
CVE-2025-12212 8.8 HIGH Tenda O3 setNetworkService GetValue stack-based overflow
CVE-2025-12211 8.8 HIGH Tenda O3 setDmzInfo GetValue stack-based overflow
CVE-2025-12235 8.0 HIGH Tenda CH22 SetIpBind fromSetIpBind buffer overflow

IV. Related Vulnerabilities

Same product: O3
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2025-12209

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