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Totolink A7100RU CVE-2026-6140

| EUVD-2026-21766 HIGH
OS Command Injection (CWE-78)
2026-04-13 VulDB GHSA-qq79-56j7-gmq4
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
Severity Changed
Apr 13, 2026 - 01:22 NVD
CRITICAL HIGH
CVSS changed
Apr 13, 2026 - 01:22 NVD
9.8 (CRITICAL) 8.9 (HIGH)
Analysis Generated
Apr 13, 2026 - 01:18 vuln.today
EUVD ID Assigned
Apr 13, 2026 - 01:15 euvd
EUVD-2026-21766
Analysis Generated
Apr 13, 2026 - 01:15 vuln.today
CVE Published
Apr 13, 2026 - 00:30 nvd
HIGH 8.9

DescriptionNVD

A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument FileName results in os command injection. The attack may be initiated remotely. The exploit has been made public and could 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 crafted FileName parameter to the UploadFirmwareFile function in /cgi-bin/cstecgi.cgi. CVSS 9.8 (Critical) with network attack vector, no privileges required, and complete system compromise possible. …

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RemediationAI

Within 24 hours: Identify and inventory all Totolik A7100RU devices running firmware 7.4cu.2313_b20191024 in your network using asset discovery tools; isolate affected devices from production networks immediately or restrict administrative access to the web interface. Within 7 days: Check Totolik's advisory page for patch availability; if patching becomes available, apply immediately to all identified units. …

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CVE-2026-6140 vulnerability details – vuln.today
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