snmpoidcompare in snmplib/snmp_api.c in Net-SNMP before 5.8 has a NULL Pointer Exception bug that can be used by an unauthenticated attacker to remotely cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-18066.json"