EUVD-2026-21074

| CVE-2026-5975 HIGH
2026-04-09 VulDB GHSA-v89g-prph-7892
8.9
CVSS 4.0
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CVSS Vector

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

4
PoC Detected
Apr 09, 2026 - 20:16 vuln.today
Public exploit code
Analysis Generated
Apr 09, 2026 - 20:15 vuln.today
EUVD ID Assigned
Apr 09, 2026 - 20:15 euvd
EUVD-2026-21074
CVE Published
Apr 09, 2026 - 19:45 nvd
HIGH 8.9

Tags

Command Injection A7100Ru

Description

A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wanIdx leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.

Analysis

OS command injection in Totolink A7100RU router firmware version 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the wanIdx parameter in the setDmzCfg function within /cgi-bin/cstecgi.cgi. CVSS 8.9 (Critical) with attack complexity low, no privileges required, and no user interaction. …

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Remediation

Within 24 hours: Identify all Totolik A7100RU devices in production and isolate from critical network paths; check Totolink vendor advisory for available firmware versions beyond 7.4cu.2313_b20191024. Within 7 days: Contact Totolink support for patch status and interim firmware alternatives; implement network-level controls restricting WAN-facing access to DMZ configuration interface (/cgi-bin/cstecgi.cgi). …

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Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +0.9
CVSS: +44
POC: +20

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EUVD-2026-21074 vulnerability details – vuln.today
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