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CVE-2026-7121

CRITICAL
9.8NVD

Summary

generated automatically from NVD data

Totolink A8000RU firmware 7.1cu.643_b20200521 contains an OS command injection flaw in the setWizardCfg function of /cgi-bin/cstecgi.cgi, part of the CGI Handler component. Manipulating the wizard argument lets a remote attacker inject operating system commands, and the NVD description notes that an exploit has been published. The issue is rated CRITICAL with a CVSS v3.1 score of 9.8 and is classified as CWE-77.

NVD description

A flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. This affects the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument wizard causes os command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used.

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EPSS · FIRST.org

3.3%probability of exploitation in the next 30 days

Higher than 88% of scored CVEs

EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-16, recomputed daily by FIRST.org.

In-depth analysis on cveo.tech

We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.

CVSS v3.1 Score

9.8
/ 10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Information

Published
27 avr. 2026
Updated
17 juin 2026
Status
Deferred
Source
cna@vuldb.com

Weaknesses (CWE)

CWE-77CWE-78

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