CVE-2026-5155
Received Received - Intake

Remote Stack-Based Buffer Overflow in Tenda CH22 Parameter Handler

Vulnerability report for CVE-2026-5155, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-03-30

Last updated on: 2026-04-02

Assigner: VulDB

Description

A vulnerability was found in Tenda CH22 1.0.0.1. This affects the function fromAdvSetWan of the file /goform/AdvSetWan of the component Parameter Handler. The manipulation of the argument wanmode results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-03-30
Last Modified
2026-04-02
Generated
2026-07-06
AI Q&A
2026-03-31
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
tenda ch22_firmware 1.0.0.1

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

Attack-Flow Graph

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Executive Summary

This vulnerability exists in the Tenda CH22 device, specifically in the function fromAdvSetWan within the /goform/AdvSetWan file of the Parameter Handler component. It is caused by improper handling of the argument wanmode, which leads to a stack-based buffer overflow.

Because of this flaw, an attacker can remotely execute an attack by manipulating the wanmode argument, potentially causing the device to behave unexpectedly or allowing the attacker to execute arbitrary code.

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

Impact Analysis

This vulnerability can have serious impacts because it allows remote attackers to exploit a stack-based buffer overflow in the device.

Potential impacts include unauthorized code execution, which could lead to full compromise of the affected device, disruption of network services, or unauthorized access to network resources.

Given the high CVSS scores (up to 9.0 in version 2.0), the vulnerability is considered critical and could severely affect the security and availability of the device.

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EPSS Chart