CVE-2026-4906

Received Received - Intake

Remote Stack-Based Buffer Overflow in Tenda AC5 POST Handler

Publication date: 2026-03-27

Last updated on: 2026-03-31

Assigner: VulDB

Description

A vulnerability was determined in Tenda AC5 15.03.06.47. The affected element is the function decodePwd of the file /goform/WizardHandle of the component POST Request Handler. Executing a manipulation of the argument WANT/WANS can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized.

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-2026-4906

EUVD

EUVD-2026-16524

Affected Vendors & Products

Vendor	Product	Version / Range
tenda	ac5_firmware	15.03.06.47

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 AC5 router, specifically in the decodePwd function within the /goform/WizardHandle file of the POST Request Handler component.

By manipulating the argument WANT/WANS, an attacker can trigger a stack-based buffer overflow.

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

The exploit for this vulnerability has been publicly disclosed, increasing the risk of it being used maliciously.

Impact Analysis

Exploiting this vulnerability can lead to a stack-based buffer overflow, which may allow an attacker to execute arbitrary code on the affected device.

Because the attack can be performed remotely, it poses a significant security risk, potentially allowing unauthorized access or control over the router.

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

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