An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Failure to validate the sizes of `gstup` and `gstdwn` before concatenating them into `gstruleQos` may lead to buffer overflow.Referenceshttps://www.tenda.com.cn/material/show/2707https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24115
