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CVE-2026-4489— Tenda A18 Pro fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow

Quick assessment

Affected
Tenda A18 Pro
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 A18是中国腾达（Tenda）公司的一款 AC1200 双频 Wi-Fi 中继器。 Tenda A18 Pro 02.03.02.28版本存在安全漏洞，该漏洞源于文件/goform/fast_setting_wifi_set中函数form_fast_setting_wifi_set存在栈缓冲区溢出。

CVSS 8.8 · High EPSS 0.51% · P41
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I. Basic Information for CVE-2026-4489

Vulnerability Information
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Vulnerability Title
Tenda A18 Pro fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in Tenda A18 Pro 02.03.02.28. This vulnerability affects the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set. The manipulation results in stack-based buffer overflow. The attack may be launched remotely. The exploit is now 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 A18 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda A18是中国腾达（Tenda）公司的一款 AC1200 双频 Wi-Fi 中继器。 Tenda A18 Pro 02.03.02.28版本存在安全漏洞，该漏洞源于文件/goform/fast_setting_wifi_set中函数form_fast_setting_wifi_set存在栈缓冲区溢出。
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 A18 Pro 02.03.02.28 -

II. Public POCs for CVE-2026-4489

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III. Intelligence Information for CVE-2026-4489

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Vendor Advisories for CVE-2026-4489 (2)

Other References for CVE-2026-4489 (1)

Same Patch Batch · Tenda · 2026-03-20 · 5 CVEs total

CVE-2026-4493 8.8 HIGH Tenda A18 Pro MAC Filtering Configuration Endpoint setMacFilterCfg sub_423B50 stack-based
CVE-2026-4492 8.8 HIGH Tenda A18 Pro formSetQosBand set_qosMib_list stack-based overflow
CVE-2026-4491 8.8 HIGH Tenda A18 Pro SetIpMacBind fromSetIpMacBind stack-based overflow
CVE-2026-4490 8.8 HIGH Tenda A18 Pro openSchedWifi setSchedWifi stack-based overflow

IV. Related Vulnerabilities

Same product: A18 Pro
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-4489

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