Totolink A7100RU EUVD-2026-21812

| CVE-2026-6156 HIGH
OS Command Injection (CWE-78)
2026-04-13 VulDB
Command Injection
8.9
CVSS 4.0
Share

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Apr 13, 2026 - 04:24 vuln.today
Severity Changed
Apr 13, 2026 - 04:22 NVD
CRITICAL HIGH
CVSS changed
Apr 13, 2026 - 04:22 NVD
9.8 (CRITICAL) 8.9 (HIGH)

DescriptionNVD

A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setIpQosRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument Comment leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used.

AnalysisAI

OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the Comment parameter in the setIpQosRules function exposed through /cgi-bin/cstecgi.cgi. CVSS 8.9 (Critical) with network attack vector, low complexity, and no privileges required. …

Sign in for full analysis, threat intelligence, and remediation guidance.

RemediationAI

Within 24 hours: Identify all Totolik A7100RU devices in production using network scanning and firmware inventory tools; isolate affected units from production networks if possible. Within 7 days: Contact Totolik support to confirm firmware update availability and timeline; implement network-level access controls restricting WAN access to the /cgi-bin/cstecgi.cgi endpoint. …

Sign in for detailed remediation steps.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Share

EUVD-2026-21812 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy