| 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 copy_msg_element function within the firmware's devdiscover service (at offset 0x4049C464). This function calls memcpy when copying message element data, but fails to perform an upper-bound check on a user-controllable length field originating from network packets. A specially crafted UDP request can trigger this vulnerability. |
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| Source | ⚠️ https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1900R-copy_msg_element(2) |
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| User | xiaobor123 (UID 76914) |
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| Submission | 08/13/2026 12:35 (2 months ago) |
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| Moderation | 09/27/2026 16:30 (2 months later) |
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| Status | Accepted |
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| VulDB entry | 410907 [FAST FAC1900R 20190827_2.0.2 devdiscover Service copy_msg_element stack-based overflow] |
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| Points | 20 |
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