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CVE-2026-7139 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: April 27, 2026

Totolink A8000RU - Command Injection

Published: April 27, 2026Updated: April 27, 2026Remote Exploitable

Overview

Totolink A8000RU 7.1cu.643_b20200521 contains a command injection caused by manipulation of the "mode" argument in /cgi-bin/cstecgi.cgi CGI Handler, letting remote attackers execute arbitrary OS commands, exploit requires no special privileges.

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 taking full control of the device.

Mitigation

Update to the latest version.

References

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Apr 27, 2026

🔴 CVE-2026-7139 - Critical (9.8) A flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument mode causes os command injection. The a... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-7139/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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Related Resources

Details

CVE ID: CVE-2026-7139
Severity: Critical
CVSS Score: 9.8
Type: command_injection
Status: rejected
EPSS: 89.2%
Social Posts: 1

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