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CVE-2026-5567— Tenda M3 Destination setAdvPolicyData buffer overflow

Quick assessment

Affected
Tenda M3
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 M3是中国腾达（Tenda）公司的一款门禁控制器。 Tenda M3 1.0.0.10版本存在安全漏洞，该漏洞源于对文件/goform/setAdvPolicyData中参数policyType的错误操作，可能导致缓冲区溢出。

CVSS 8.8 · High EPSS 1.01% · P62
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I. Basic Information for CVE-2026-5567

Vulnerability Information
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Vulnerability Title
Tenda M3 Destination setAdvPolicyData buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Tenda M3 1.0.0.10. This vulnerability affects the function setAdvPolicyData of the file /goform/setAdvPolicyData of the component Destination Handler. Executing a manipulation of the argument policyType can lead to buffer overflow. The attack can be executed 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
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda M3 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda M3是中国腾达（Tenda）公司的一款门禁控制器。 Tenda M3 1.0.0.10版本存在安全漏洞，该漏洞源于对文件/goform/setAdvPolicyData中参数policyType的错误操作，可能导致缓冲区溢出。
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 M3 1.0.0.10 cpe:2.3:o:tenda:m3_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5567

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9048 chars
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III. Intelligence Information for CVE-2026-5567

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Proof of Concept for CVE-2026-5567 (1)

Same Patch Batch · Tenda · 2026-04-05 · 7 CVEs total

CVE-2026-5548 8.8 HIGH Tenda AC10 httpd fromSysToolChangePwd stack-based overflow
CVE-2026-5550 8.8 HIGH Tenda AC10 httpd fromSysToolChangePwd stack-based overflow
CVE-2026-5604 8.8 HIGH Tenda CH22 Parameter CertLocalPrecreate formCertLocalPrecreate stack-based overflow
CVE-2026-5605 8.8 HIGH Tenda CH22 WrlExtraSet formWrlExtraSet stack-based overflow
CVE-2026-5547 6.3 MEDIUM Tenda AC10 httpd formAddMacfilterRule os command injection
CVE-2026-5549 5.3 MEDIUM Tenda AC10 RSA 2048-bit Private Key privkeySrv.pem hard-coded key

IV. Related Vulnerabilities

Same product: M3
Same vendor: Tenda
Same weakness: CWE-120

V. Comments for CVE-2026-5567

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