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CVE-2026-5609— Tenda i12 Parameter wifiSSIDset formwrlSSIDset stack-based overflow

Quick assessment

Affected
Tenda i12
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 i12是中国腾达（Tenda）公司的一款腾达吸顶式无线接入点。 Tenda i12 1.0.0.11(3862)版本存在安全漏洞，该漏洞源于对参数index和wl_radio的错误操作，可能导致栈缓冲区溢出攻击。

CVSS 8.8 · High EPSS 1.01% · P62
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I. Basic Information for CVE-2026-5609

Vulnerability Information
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Vulnerability Title
Tenda i12 Parameter wifiSSIDset formwrlSSIDset stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Tenda i12 1.0.0.11(3862). Affected by this vulnerability is the function formwrlSSIDset of the file /goform/wifiSSIDset of the component Parameter Handler. This manipulation of the argument index/wl_radio causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been published 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 i12 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda i12是中国腾达（Tenda）公司的一款腾达吸顶式无线接入点。 Tenda i12 1.0.0.11(3862)版本存在安全漏洞，该漏洞源于对参数index和wl_radio的错误操作，可能导致栈缓冲区溢出攻击。
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 i12 1.0.0.11(3862) cpe:2.3:o:tenda:i12_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5609

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7157 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-2026-5609

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Other References for CVE-2026-5609 (1)

Same Patch Batch · Tenda · 2026-04-06 · 6 CVEs total

CVE-2026-5685 8.8 HIGH Tenda CX12L addressNat fromAddressNat stack-based overflow
CVE-2026-5686 8.8 HIGH Tenda CX12L RouteStatic fromRouteStatic stack-based overflow
CVE-2026-5687 8.8 HIGH Tenda CX12L NatStaticSetting fromNatStaticSetting stack-based overflow
CVE-2026-5684 8.0 HIGH Tenda CX12L webExcptypemanFilter fromwebExcptypemanFilter stack-based overflow
CVE-2026-5683 5.5 MEDIUM Tenda CX12L P2pListFilter fromP2pListFilter stack-based overflow

IV. Related Vulnerabilities

Same product: i12
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-5609

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