Is Command Injection affected by CVE-2026-6112?

Totolik A7100RU routers running firmware 7.4cu.2313_b20191024 are vulnerable to unauthenticated remote command execution via a CGI interface flaw, allowing attackers to compromise routers without credentials.

CVE-2026-6112

EUVD-2026-21700 HIGH

2026-04-12 VulDB

8.9

CVSS 4.0

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

Lifecycle Timeline

Severity Changed

Apr 12, 2026 - 04:22 NVD

CRITICAL HIGH

CVSS Changed

Apr 12, 2026 - 04:22 NVD

9.8 (CRITICAL) 8.9 (HIGH)

Analysis Generated

Apr 12, 2026 - 04:05 vuln.today

Description

A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument maxRtrAdvInterval causes os command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

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 CGI interface. The setRadvdCfg function in /cgi-bin/cstecgi.cgi fails to sanitize the maxRtrAdvInterval parameter, enabling command injection through crafted HTTP requests. …

Remediation

Within 24 hours: Identify all Totolik A7100RU devices in your environment (check inventory, IP scans, DHCP logs). Within 7 days: Contact Totolik support for firmware availability and evaluate emergency patching procedures; if devices are internet-exposed, immediately isolate them or disable remote management access. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.9

CVSS: +44

POC: +20

CVE-2026-6112 vulnerability details – vuln.today

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CVE-2026-6112

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CVE-2026-6112

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External POC / Exploit Code