| Título | Tenda RX3 V16.03.13.11 Stack-based Buffer Overflow |
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| Descrição | During a security review of the Tenda RX3 router firmware (version V16.03.13.11), a critical stack-based buffer overflow vulnerability was identified in the QoS (Quality of Service) configuration endpoint /goform/formSetQosBand.
The vulnerability is located in the set_qosMib_list function, which is called by the request handler formSetQosBand. The function receives a user-controlled list parameter. It searches for a delimiter and then uses the unsafe strcpy function to copy the contents of the list into a fixed-size stack buffer qos_str (256 bytes). Since the input length is not validated, an attacker can overwrite the stack frame, leading to a Denial of Service (DoS) or arbitrary code execution. |
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| Fonte | ⚠️ https://github.com/LX-66-LX/cve-new/issues/8 |
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| Utilizador | LX-66-LX (UID 92717) |
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| Submissão | 31/01/2026 12h01 (há 3 meses) |
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| Moderação | 07/02/2026 18h16 (7 days later) |
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| Estado | Aceite |
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| Entrada VulDB | 344890 [Tenda RX3 16.03.13.11 /goform/formSetQosBand set_qosMib_list Excesso de tampão] |
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| Pontos | 20 |
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