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CVE-2026-5830— Tenda AC15 SysToolChangePwd websGetVar stack-based overflow

Quick assessment

Affected
Tenda AC15
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 AC15是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC15 15.03.05.18版本存在安全漏洞，该漏洞源于文件/goform/SysToolChangePwd中的函数websGetVar对参数oldPwd/newPwd/cfmPwd的错误操作导致基于栈的缓冲区溢出，可能导致远程攻击。

CVSS 8.8 · High EPSS 1.00% · P62

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-5830

Vulnerability Information
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Vulnerability Title
Tenda AC15 SysToolChangePwd websGetVar stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified in Tenda AC15 15.03.05.18. This affects the function websGetVar of the file /goform/SysToolChangePwd. Such manipulation of the argument oldPwd/newPwd/cfmPwd leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might 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 AC15 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC15是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC15 15.03.05.18版本存在安全漏洞，该漏洞源于文件/goform/SysToolChangePwd中的函数websGetVar对参数oldPwd/newPwd/cfmPwd的错误操作导致基于栈的缓冲区溢出，可能导致远程攻击。
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 AC15 15.03.05.18 cpe:2.3:o:tenda:ac15_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5830

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III. Intelligence Information for CVE-2026-5830

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Other References for CVE-2026-5830 (1)

Same Patch Batch · Tenda · 2026-04-09 · 8 CVEs total

CVE-2026-5991 8.8 HIGH Tenda F451 WrlExtraSet formWrlExtraSet stack-based overflow
CVE-2026-5990 8.8 HIGH Tenda F451 SafeEmailFilter fromSafeEmailFilter stack-based overflow
CVE-2026-5989 8.8 HIGH Tenda F451 RouteStatic fromRouteStatic stack-based overflow
CVE-2026-5988 8.8 HIGH Tenda F451 AdvSetWrlsafeset formWrlsafeset stack-based overflow
CVE-2026-5962 7.3 HIGH Tenda CH22 httpd R7WebsSecurityHandlerfunction path traversal
CVE-2026-5849 7.3 HIGH Tenda i12 HTTP path traversal
CVE-2026-5841 7.3 HIGH Tenda i3 HTTP R7WebsSecurityHandler path traversal

IV. Related Vulnerabilities

Same product: AC15
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-5830

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