| Title | TOTOLINK N600R firmware V4.3.0cu.7866_B20220506 Buffer Overflow |
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| Description | A buffer overflow vulnerability has been identified in the TOTOLINK N600R router firmware that allows remote attackers to potentially execute arbitrary code or cause denial of service through malformed HTTP requests. The vulnerable code is within the setWiFiBasicConfig function in cstecgi.cgi. It extracts the `wepkey` parameter into `v13` and passes it into the `strcpy` function. When `wepkey` is specified with excessive data, a buffer overflow occurs. |
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| Source | ⚠️ https://github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md |
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| User | z472421519 (UID 91218) |
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| Submission | 10/01/2025 22:23 (9 months ago) |
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| Moderation | 10/07/2025 15:19 (6 days later) |
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| Status | Accepted |
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| VulDB entry | 327381 [TOTOLINK N600R up to 4.3.0cu.7866_B20220506 HTTP Request /cgi-bin/cstecgi.cgi setWiFiBasicConfig wepkey buffer overflow] |
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| Points | 20 |
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