Use after free in IPv6 subsystem in Intel(R) AMT and Intel(R) ISM versions before 11.8.77, 11.12.77, 11.22.77 and 12.0.64 may allow an unauthenticated user to potentially enable escalation of privilege via network access.
https://www.synology.com/security/advisory/Synology_SA_20_15
https://www.kb.cert.org/vuls/id/257161
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.html