| Title | TOTOLINK T6 V4.1.5cu.748_B20211015 Buffer Overflow |
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| Description | The T6 routers has many shared library that will be loaded in memory when running. In function tcpcheck_net, the v7 buffer is 128 bytes, and the sprintf doesn't check for the length of input.
An attacker can send a malicious packet (both MQTT and HTTP) and overwrite the saved return address, lead it to RCE.
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| Source | ⚠️ https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/9.md |
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| User | reisen_1943 (UID 76990) |
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| Submission | 07/22/2025 17:42 (1 Year ago) |
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| Moderation | 07/25/2025 09:36 (3 days later) |
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| Status | Accepted |
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| VulDB entry | 317584 [TOTOLINK T6 4.1.5cu.748_B20211015 MQTT Packet /router/meshSlaveDlfw tcpcheck_net serverIp buffer overflow] |
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| Points | 19 |
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