Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.
https://www.zerodayinitiative.com/advisories/ZDI-21-340/
https://www.zerodayinitiative.com/advisories/ZDI-21-339/
https://www.synology.com/security/advisory/Synology_SA_20_26