CVE-2026-5688
Received Received - Intake

OS Command Injection in Totolink A7100RU setDdnsCfg Function

Vulnerability report for CVE-2026-5688, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-04-06

Last updated on: 2026-04-29

Assigner: VulDB

Description

A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument provider leads to os command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.

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Meta Information

Published
2026-04-06
Last Modified
2026-04-29
Generated
2026-07-06
AI Q&A
2026-04-07
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink a7100ru 7.4cu.2313_b20191024

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This vulnerability exists in the Totolink A7100RU device, specifically in the setDdnsCfg function of the /cgi-bin/cstecgi.cgi file. It involves manipulation of the 'provider' argument, which leads to an operating system command injection. This means an attacker can remotely execute arbitrary commands on the device by exploiting this flaw.

Impact Analysis

The vulnerability allows remote attackers to execute arbitrary OS commands on the affected device without any authentication or user interaction. This can lead to unauthorized control over the device, potentially compromising its confidentiality, integrity, and availability.

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