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CVE-2026-5851 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: April 9, 2026

Totolink A7100RU - Command Injection

Published: April 9, 2026Updated: April 9, 2026Remote Exploitable

Overview

Totolink A7100RU 7.4cu.2313_b20191024 contains a command injection caused by manipulation of the "enable" argument in setUPnPCfg function of /cgi-bin/cstecgi.cgi CGI Handler, letting remote attackers execute OS commands.

Severity & Score

Severity: Critical

CVSS Score: 9.8

EPSS Score: 89.2%(Probability of exploitation in next 30 days)

Impact

Remote attackers can execute arbitrary OS commands, potentially leading to full system compromise.

Mitigation

Update to the latest version.

References

Social Media Activity(2 posts)

OffSequence

@offseq

Apr 9, 2026

🔒 CVE-2026-5851: CRITICAL OS command injection in Totolink A7100RU (7.4cu.2313_b20191024). Remote, unauthenticated RCE possible via /cgi-bin/cstecgi.cgi. Exploit public, no patch. Isolate device and check for updates! https://radar.offseq.com/threat/cve-2026-5851-os-command-injection-in-totolink-a71-cec71662 #OffSeq #CVE20265851 #IoTSec

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TheHackerWire

@thehackerwire

Apr 9, 2026

🔴 CVE-2026-5851 - Critical (9.8) 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 injecti... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-5851/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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Related Resources

Details

CVE ID: CVE-2026-5851
Severity: Critical
CVSS Score: 9.8
Type: command_injection
Status: new
EPSS: 89.2%
Social Posts: 2

CWE

CWE-77

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score

89.2%Probability of exploitation in the next 30 days