| Título | Tenda AC20 V1.0re_V16.03.08.05 Buffer Overflow |
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| Descripción | A stack-based buffer overflow vulnerability exists in Tenda AC20 router via the `/goform/SetFirewallCfg` endpoint. The vulnerability occurs when processing the `firewallEn` parameter: after verifying input length > 3 via `strlen()`, the program uses unsafe `strcpy()` to copy user-controlled data into a fixed-size stack buffer . Due to missing upper-bound length validation, attackers can craft oversized payloads to overflow the buffer. Successful exploitation could allow denial of service, arbitrary code execution.
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| Fuente | ⚠️ https://github.com/LaiwanHundun/CVE/blob/main/cve1 |
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| Usuario | hundun (UID 88636) |
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| Sumisión | 2025-08-02 11:51 (hace 9 meses) |
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| Moderación | 2025-08-09 09:58 (7 days later) |
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| Estado | Aceptado |
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| Entrada de VulDB | 319339 [Tenda AC20 16.03.08.05 /goform/SetFirewallCfg strcpy firewallEn desbordamiento de búfer] |
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| Puntos | 20 |
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