CVE-2026-6016
Received Received - Intake

Remote Stack-Based Buffer Overflow in Tenda AC9 POST Handler

Vulnerability report for CVE-2026-6016, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-04-10

Last updated on: 2026-04-30

Assigner: VulDB

Description

A vulnerability was found in Tenda AC9 15.03.02.13. The affected element is the function decodePwd of the file /goform/WizardHandle of the component POST Request Handler. Performing a manipulation of the argument WANS results in stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made public and could be used.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-04-10
Last Modified
2026-04-30
Generated
2026-07-06
AI Q&A
2026-04-10
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
tenda ac9_firmware 15.03.02.13

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

This vulnerability exists in the Tenda AC9 router, specifically in the decodePwd function within the /goform/WizardHandle file of the POST Request Handler component. It is caused by improper handling of the WANS argument, which can lead to a stack-based buffer overflow. This means that an attacker can remotely send specially crafted data to overflow the buffer and potentially execute arbitrary code or cause the device to crash.

Impact Analysis

The vulnerability can be exploited remotely without user interaction, allowing an attacker with low privileges to cause a stack-based buffer overflow. This can lead to severe impacts such as remote code execution, denial of service, or complete compromise of the affected device. Given the high CVSS scores, the impact on confidentiality, integrity, and availability is significant.

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EPSS Chart