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Totolink A7100RU CVE-2026-6155

| EUVD-2026-21810 HIGH
OS Command Injection (CWE-78)
2026-04-13 VulDB
Command Injection
8.9
CVSS 4.0
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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

8
Re-analysis Queued
Apr 27, 2026 - 19:07 vuln.today
cvss_changed
PoC Detected
Apr 27, 2026 - 19:05 vuln.today
Public exploit code
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)
EUVD ID Assigned
Apr 13, 2026 - 04:15 euvd
EUVD-2026-21810
Analysis Generated
Apr 13, 2026 - 04:15 vuln.today
CVE Published
Apr 13, 2026 - 03:15 nvd
HIGH 8.9

DescriptionNVD

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.

AnalysisAI

OS command injection in Totolink A7100RU router firmware 7.4cu.2313 allows unauthenticated remote attackers to execute arbitrary system commands via the pppoeServiceName parameter in the setWanCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (GitHub POC), enabling trivial remote compromise with high impact on confidentiality, integrity, and availability. …

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RemediationAI

Within 24 hours: Identify and inventory all Totolik A7100RU devices in production using network scanning or device management systems; isolate affected devices from critical network segments if firmware 7.4cu.2313 is confirmed. Within 7 days: Contact Totolik support to determine if a patched firmware version exists for this model and severity level; if available, stage and test the update in a controlled environment. …

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CVE-2026-6155 vulnerability details – vuln.today
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