| Title | Fast FAC1900R 20190827_2.0.2 Stack-based Buffer Overflow |
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| Description | A stack-based buffer overflow vulnerability exists in the get_alias_name function within the firmware's uhttpd service (at offset 0x4049C9A8). The function copies the cloud_config.info.alias (device alias) field from an HTTP JSON request into a stack buffer using memcpy, but fails to perform an upper-bound check on the user-controllable string length. A specially crafted HTTP POST request can trigger this vulnerability. |
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| Source | ⚠️ https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1900R-devDiscoverNotify |
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| User | xiaobor123 (UID 76914) |
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| Submission | 07/23/2026 08:01 (2 months ago) |
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| Moderation | 09/23/2026 17:20 (2 months later) |
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| Status | Accepted |
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| VulDB entry | 408999 [Fast FAC1900R 20190827_2.0.2 uhttpd get_alias_name stack-based overflow] |
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| Points | 20 |
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