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CVE-2026-6015— Tenda AC9 POST Request QuickIndex formQuickIndex stack-based overflow

Quick assessment

Affected
Tenda AC9
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 AC9是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC9 15.03.02.13版本存在安全漏洞，该漏洞源于对文件/goform/QuickIndex中参数PPPOEPassword的错误操作，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-2026-6015

Vulnerability Information
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Vulnerability Title
Tenda AC9 POST Request QuickIndex formQuickIndex stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in Tenda AC9 15.03.02.13. Impacted is the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. Such manipulation of the argument PPPOEPassword leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the 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 AC9 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC9是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC9 15.03.02.13版本存在安全漏洞，该漏洞源于对文件/goform/QuickIndex中参数PPPOEPassword的错误操作，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 AC9 15.03.02.13 cpe:2.3:o:tenda:ac9_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-6015

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III. Intelligence Information for CVE-2026-6015

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Other References for CVE-2026-6015 (1)

Same Patch Batch · Tenda · 2026-04-10 · 4 CVEs total

CVE-2026-6016 8.8 HIGH Tenda AC9 POST Request WizardHandle decodePwd stack-based overflow
CVE-2026-5992 8.8 HIGH Tenda F451 P2pListFilter fromP2pListFilter stack-based overflow
CVE-2026-6024 7.3 HIGH Tenda i6 HTTP R7WebsSecurityHandlerfunction path traversal

IV. Related Vulnerabilities

Same product: AC9
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-6015

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