CVE-2026-3696 Details
Description
A vulnerability was found in Totolink N300RH 6..1c.1353_B20190305. The affected element is the function setWiFiWpsConfig of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation results in os command injection. The attack can be initiated remotely. The exploit has been made public and could be used.
A pre-authentication OS command injection vulnerability exists in the Totolink N300RH V4 router running firmware version 6.1c.1353_B20190305. The vulnerability is located in the CGI handler, specifically within the setWiFiWpsConfig function of the file /cgi-bin/cstecgi.cgi. This issue arises because the function retrieves user-controlled input from the HTTP parameter PIN, and directly embeds it into a shell command using sprintf, without any sanitization. The command is then executed with root privileges via CsteSystem(). As a result, remote attackers can inject arbitrary commands that are executed with full control over the device, potentially compromising the entire network.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/JXBbozaihuang/vuln-research/issues/2 | [email protected] | ExploitIssue TrackingThird Party Advisory |
| https://vuldb.com/?ctiid.349642 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.349642 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.765681 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.totolink.net/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
| 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 n300rh firmware | 6.1c.1353_b20190305 |
CPE
Remediation
| |
| totolink n300rh | 4.0 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 10, 2026 | Initial Analysis | [email protected] |
| Mar 8, 2026 | New CVE Received | [email protected] |