According to Openwrt.org, “LEDE’s spinoff and subsequent re-merge into OpenWrt will not alter the overall technical direction taken by the unified project. We will continue to work on improving stability and release maintenance while aiming for frequent minor releases to address critical bugs and security issues like we did with LEDE 17.01
Critical RCE Bug Affects Millions of OpenWrt-based Network Mar 25, 2020 Installing OpenWRT on a Linksys EA4500 - Spotlight Oct 19, 2018 OpenWrt Tor proxy and anonymizing middlebox setup guide Sep 25, 2018
It seems OpenWrt is the more common pick between it and DD-Wrt when given the option. Not Security specific but seems to point toward good things about it level 2
Marvell Demonstrates Powerful Security Software
Jul 14, 2015
Marvell Demonstrates Powerful Security Software Thanks to its collaboration with leading players in the OpenWrt and security space, Marvell will be able to show those attending the OpenWrt Summit (Prague, Czech Republic, 26-27 th October) new beneficial developments with regard to its Marvell ARMADA® multi-core processors. In collaboration with contributors Sartura and Sentinel, these developments will be demonstrated on Marvell’s Bootlin Working To Boost OpenWrt Security With SELinux