CVE-2026-6155

Totolink A7100RU CGI cstecgi.cgi setWanCfg os command injection

Published: Apr 13, 2026Updated: Apr 27, 2026 Sources: CVE List NVD BDUCWE-77

9.8CRITICAL

Description

A weakness has been identified in Totolink A7100RU 7.4cu.2313. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument pppoeServiceName can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

Open in CVSS calculator →

Weaknesses

CWE-77 CWE-78

Affected Products

TOTOLink

commercial·TWaka totolink corp.

A7100RU

Networking Infrastructure

and 1 more affected products View all →

Exploitability

Official Patch Available

Is your org exposed to CVE-2026-6155?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique

Execution

View detailed technique mapping

References

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_196/README.md

github.com

https://vuldb.com/vuln/357035

vuldb.com

https://vuldb.com/vuln/357035/cti

vuldb.com

and 2 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-6155 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows