CVE-2026-5103 Details
Description
A weakness has been identified in Totolink A3300R 17.0.0cu.557_b20221024. This issue affects the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument enable causes command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
A command injection vulnerability has been identified in the Totolink A3300R router, specifically in version 17.0.0cu.557_b20221024. The issue arises in the 'setUPnPCfg' function within the '/cgi-bin/cstecgi.cgi' file. This vulnerability allows remote attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter in a crafted request. The exploitation of this vulnerability is made easier by the fact that the router's web server, 'shttpd', does not properly sanitize user input before it is executed as a command.
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 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_enable_cmd_inject | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/submit/779140 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/vuln/354128 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/vuln/354128/cti | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.totolink.net/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
| CWE-74 | Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') | [email protected] |
| CWE-77 | Improper Neutralization of Special Elements used in a Command ('Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| totolink a3300r firmware | 17.0.0cu.557_b20221024 |
CPE
Remediation
| |
| totolink a3300r | All versions |
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 30, 2026 | Initial Analysis | [email protected] |
| Mar 30, 2026 | New CVE Received | [email protected] |