| Title | Tenda Router US_W20EV4.0br_V15.11.0.61068_1546_841_CN_TDC Memory Corruption |
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| Description | Tenda W20E contains a stack-based buffer overflow in the formDelDhcpRule handler. The handler copies the attacker-controlled value with the delDhcpIndex parameter into a fixed-size 128-byte stack buffer using strcpy without validating its length. An oversized value causes stack memory corruption and reliably crashes the web management service.
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| Source | ⚠️ https://github.com/Amalll-Sec/router-vulnerability-research/tree/main/advisories/Tenda/W20E/formDelDhcpRule |
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| User | AmaIIl (UID 29184) |
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| Submission | 08/04/2026 15:50 (1 month ago) |
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| Moderation | 09/13/2026 06:49 (1 month later) |
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| Status | Duplicate |
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| VulDB entry | 209435 [Tenda W20E 15.11.0.6 /goform/delDhcpRules/ formDelDhcpRule stack-based overflow] |
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| Points | 0 |
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