{"id":"CVE-2018-18066","aliases":["DEBIAN-CVE-2018-18066","EUVD-2018-9805","GHSA-9mpr-24m6-767p","RHSA-2020:1081","RHSA-2020:2539","UBUNTU-CVE-2018-18066"],"status":"published","title":"snmp_oid_compare in snmplib/snmp_api.c in Net-SNMP before 5.8 has a NULL Pointer Exception bug...","description":"snmp_oid_compare 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.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0359,"percentile":0.89514,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2018-10-08T18:00:00Z","modified":"2026-10-24T10:30:55Z","fixes":[{"ecosystem":"Debian:12","package":"net-snmp","fixed_in":["5.7.3+dfsg-1.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"net-snmp","fixed_in":["5.7.3+dfsg-1.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"net-snmp","fixed_in":["5.7.3+dfsg-1.1"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::client","package":"net-snmp","fixed_in":["1:5.7.2-47.el7"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:7::client","package":"net-snmp-agent-libs","fixed_in":["1:5.7.2-47.el7"],"sources":["osv"]},{"ecosystem":"Red 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