| Titre | Totolink A3300R 17.0.0cu.557_b20221024 Command Injection |
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| Description | The vulnerability exists within the router's shttpdweb service. It allows a remote attacker to execute arbitrary operating system commands on the target device by sending a specially crafted network request, which can lead to a complete device compromise. The overall vulnerability trigger flow is illustrated in the provided diagram: .
The technical root cause is the unsafe handling of user-supplied input. The detailed exploit chain is as follows:
1.Malicious Input Entry Point: The attack is initiated when a user-controlled parameter named "vlanPriLan3" is processed. The program reads this parameter's value within the sub_423718 function .
2.Unsafe Command Construction: The value of the "vlanPriLan3" parameter is then directly inserted into a command string (v11) using the snprintffunction without proper sanitization .
3.Arbitrary Command Execution: This constructed command string is passed to the CsteSystem function, where it is ultimately executed by the execv() system call. |
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| La source | ⚠️ https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_vlanPriLan3_cmd_inject |
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| Utilisateur | LvHW (UID 96399) |
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| Soumission | 13/03/2026 03:53 (il y a 21 jours) |
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| Modérer | 30/03/2026 20:53 (18 days later) |
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| Statut | Accepté |
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| Entrée VulDB | 354246 [Totolink A3300R 17.0.0cu.557_b20221024 /cgi-bin/cstecgi.cgi setIptvCfg vlanPriLan3 élévation de privilèges] |
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| Points | 20 |
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