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CVE-2026-4906— Tenda AC5 POST Request WizardHandle decodePwd stack-based overflow

Quick assessment

Affected
Tenda AC5
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tenda AC5是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC5 15.03.06.47版本存在安全漏洞，该漏洞源于对文件/goform/WizardHandle中参数WANT/WANS的操作不当，可能导致栈缓冲区溢出。

CVSS 8.8 · High EPSS 1.01% · P62

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4906

Vulnerability Information
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Vulnerability Title
Tenda AC5 POST Request WizardHandle decodePwd stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Tenda AC5 15.03.06.47. The affected element is the function decodePwd of the file /goform/WizardHandle of the component POST Request Handler. Executing a manipulation of the argument WANT/WANS can lead to stack-based buffer overflow. The attack can be executed remotely. 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 AC5 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC5是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC5 15.03.06.47版本存在安全漏洞，该漏洞源于对文件/goform/WizardHandle中参数WANT/WANS的操作不当，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 AC5 15.03.06.47 cpe:2.3:o:tenda:ac5_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4906

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III. Intelligence Information for CVE-2026-4906

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Vendor Advisories for CVE-2026-4906 (2)

Security Blog Posts for CVE-2026-4906 (1)

Same Patch Batch · Tenda · 2026-03-27 · 5 CVEs total

CVE-2026-4960 8.8 HIGH Tenda AC6 POST Request WizardHandle fromWizardHandle stack-based overflow
CVE-2026-4961 8.8 HIGH Tenda AC6 POST Request QuickIndex formQuickIndex stack-based overflow
CVE-2026-4974 8.8 HIGH Tenda AC7 POST Request SetSysTimeCfg fromSetSysTime memory corruption
CVE-2026-4975 8.8 HIGH Tenda AC15 POST Request setcfm formSetCfm memory corruption

IV. Related Vulnerabilities

Same product: AC5
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-4906

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