Critical Buffer Overflow Vulnerability Discovered in JD Cloud Box AX6600

A critical stack-based buffer overflow vulnerability (CVE-2026-11413) has been identified in JingDong JD Cloud Box AX6600 firmware version 4.5.3.r4546. This flaw in the `set_macfilter` function allows remote attackers to exploit improper input validation and memory management. The vulnerability enables remote exploitation without physical access, and an exploit has been publicly disclosed.