Out-of-bounds write vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary code via syno_finder_site HTTP header.
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1159
https://www.synology.com/security/advisory/Synology_SA_20_26