| Titolo | Tenda W20E Enterprise Router V15.11.0.6 Stack-based Buffer Overflow |
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| Descrizione | A stack-based buffer overflow vulnerability has been identified in the web management interface of the Tenda W20E enterprise router. An attacker can trigger this vulnerability by sending a maliciously crafted, overly long string within the gotoUrl parameter to the /goform/PortalAuth endpoint. Successful exploitation can result in a service crash (DoS) or Remote Code Execution (RCE) with root privileges.
Under certain conditions , the function attempts to retrieve a user-provided fallback URL using websGetVar(wp, "gotoUrl", ...). The retrieved value is then copied into the redirect_url buffer using the unsafe strcpy function:
Since there is no length validation on the gotoUrl input, an attacker can provide a string significantly longer than 256 bytes. This will overflow the stack buffer, overwriting the saved Link Register (LR/Return Address) and allowing the attacker to hijack the program's control flow. |
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| Fonte | ⚠️ https://github.com/Robots10/IoT_vlu/blob/main/reports/Tenda/formPortalAuth/formPortalAuth.md |
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| Utente | hacker128 (UID 93883) |
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| Sottomissione | 24/05/2026 17:27 (2 mesi fa) |
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| Moderazione | 07/06/2026 18:06 (14 days later) |
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| Stato | Accettato |
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| Voce VulDB | 369143 [Tenda W20E 15.11.0.6 Web Management Interface /goform/PortalAuth formPortalAuth gotoUrl buffer overflow] |
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| Punti | 20 |
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