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CVE-2026-7243 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: April 28, 2026

Totolink A8000RU - Command Injection

Published: April 28, 2026Updated: April 28, 2026Remote Exploitable

Overview

Totolink A8000RU 7.1cu.643_b20200521 contains a command injection caused by manipulation of the "maxRtrAdvInterval" argument in setRadvdCfg function of /cgi-bin/cstecgi.cgi CGI Handler, letting remote attackers execute 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 leading to full system compromise.

Mitigation

Update to the latest version or apply vendor patches addressing this issue.

References

Social Media Activity(1 post)

OffSequence

@offseq

Apr 28, 2026

🚨 CVE-2026-7243: Critical OS command injection in Totolink A8000RU (7.1cu.643_b20200521). Remote, unauthenticated RCE risk — public exploit out, no patch yet. Lock down management access & monitor for updates. https://radar.offseq.com/threat/cve-2026-7243-os-command-injection-in-totolink-a80-73a189fb #OffSeq #Vulnerability #RouterSecurity

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Related Resources

Details

CVE ID: CVE-2026-7243
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