EUVD-2026-20864

| CVE-2026-5851 HIGH
2026-04-09 VulDB GHSA-323c-322q-9h7v
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 - 06:16 vuln.today
Public exploit code
Analysis Generated
Apr 09, 2026 - 06:15 vuln.today
EUVD ID Assigned
Apr 09, 2026 - 06:15 euvd
EUVD-2026-20864
CVE Published
Apr 09, 2026 - 06:00 nvd
HIGH 8.9

Tags

TOTOLINK Command Injection RCE A7100Ru

Description

A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument enable results in os command injection. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

Analysis

OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the 'enable' parameter in setUPnPCfg function within /cgi-bin/cstecgi.cgi. Publicly available exploit code exists. …

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Remediation

Within 24 hours: Identify all Totolik A7100RU devices in production and document firmware versions; isolate affected units (firmware 7.4cu.2313_b20191024) from production networks or place behind restrictive firewall rules blocking access to /cgi-bin/cstecgi.cgi. Within 7 days: Contact Totolink support to confirm patch availability status and timeline; evaluate replacement hardware if patch remains unavailable. …

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Priority Score

65
Low Medium High Critical
KEV: 0
EPSS: +0.9
CVSS: +44
POC: +20

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EUVD-2026-20864 vulnerability details – vuln.today
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