CVE-2026-4961

Received Received - Intake

Stack-Based Buffer Overflow in Tenda AC6 POST Handler

Publication date: 2026-03-27

Last updated on: 2026-03-31

Assigner: VulDB

Description

A vulnerability was identified in Tenda AC6 15.03.05.16. Affected by this vulnerability is the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. The manipulation of the argument PPPOEPassword leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is publicly available and might be used.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-03-27

Last Modified

2026-03-31

Generated

2026-07-06

AI Q&A

2026-03-27

EPSS Evaluated

2026-07-05

NVD

CVE-2026-4961

EUVD

EUVD-2026-16724

Affected Vendors & Products

Vendor	Product	Version / Range
tenda	ac6_firmware	15.03.05.16

Helpful Resources

Exploitability

CWE

KEV

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.
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Tenda AC6 router firmware version 15.03.05.16, specifically in the function formQuickIndex within the /goform/QuickIndex file, which handles POST requests.

The issue arises from improper handling of the PPPOEPassword argument, which can be manipulated to cause a stack-based buffer overflow.

This buffer overflow can be exploited remotely, meaning an attacker does not need physical access to the device to carry out the attack.

The exploit code for this vulnerability is publicly available.

Impact Analysis

Exploitation of this vulnerability can lead to severe consequences due to the stack-based buffer overflow.

An attacker could potentially execute arbitrary code on the affected device remotely, leading to unauthorized control.

This could result in disruption of network services, interception or manipulation of network traffic, or using the device as a foothold for further attacks within the network.

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