CVE-2026-5851 Details
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.
A command injection vulnerability has been identified in the Totolink A7100RU router, specifically in the 7.4cu.2313_b20191024 version. The issue arises within the CGI handler, in the file '/cgi-bin/cstecgi.cgi', particularly in the 'setUPnPCfg' function. This vulnerability allows remote attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter in a crafted HTTP request. The injected commands are executed with root privileges, potentially compromising the router and the connected network.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 9, 2026CISA-ADP
Assessed Apr 9, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_157/README.md | [email protected] | ExploitTechnical Description |
| https://vuldb.com/submit/791271 | [email protected] | Technical Description |
| https://vuldb.com/vuln/356377 | [email protected] | AdvisoryExploitPartial Content |
| https://vuldb.com/vuln/356377/cti | [email protected] | AdvisoryContent Wall |
| https://www.totolink.net/ | [email protected] | Vendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Totolink A7100RU | 7.4cu.2313_b20191024 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 9, 2026 | New CVE Received | [email protected] |