CVE-2026-5851 CRITICAL

CVE-2026-5851: Totolink A7100RU CGI cstecgi.cgi setUPnPCfg os command injection

Vendor Totolink
Product A7100RU
Weakness CWE-78
Published April 9, 2026
Last update April 9, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
April 9, 2026 Record updated