| Title | Trendnet TEW-821DAP v1.12B01 CWE-120 Buffer Copy without Checking Size of Input ('Classic Buf |
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| Description | During the firmware udpate process, there is buffer overflow vulnerability in the function sub_41EC14 of program ssi. The variable nslookup_target, which is propagated from the user input, is directly written into buffer value with the size of 2 bytes. However, there is no data size limitation. Once the hackers control and construction a user input which is greater than 392 bytes, a buffer overflow vulnerability occurs. |
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| Source | ⚠️ https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Trendnet/TEW-821DAP_BO2.md |
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| User | IOT_Res (UID 81722) |
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| Submission | 05/29/2026 08:53 (1 month ago) |
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| Moderation | 07/11/2026 12:12 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 377790 [TRENDnet TEW-821DAP 1.12B01 ssi /goform/tools_nslookup sub_41EC14 nslookup_target buffer overflow] |
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| Points | 20 |
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