CVE-2026-5851

CRITICAL

Totolink A7100RU CGI cstecgi.cgi setUPnPCfg os command injection

Title source: cna

Description

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.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-356377 | Totolink A7100RU CGI cstecgi.cgi setUPnPCfg os command injection

https://vuldb.com/vuln/356377

Signature, Permissions Required signature permissions-required

VDB-356377 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/356377/cti

Third Party Advisory third-party-advisory

Submit #791271 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection

https://vuldb.com/submit/791271

Exploit exploit

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_157/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.1413

EPSS Percentile 96.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-77 CWE-78

Status published

Products (1)

Totolink/A7100RU 7.4cu.2313_b20191024

Published Apr 09, 2026

Tracked Since Apr 09, 2026