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NOTE: this can be leveraged by remote attackers using CVE-2016-9565.","severity":{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-06","score":0.04885,"percentile":0.92108,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-264","CWE-59"],"published":"2016-12-15T00:00:00Z","modified":"2026-10-20T10:48:05Z","exploits":[{"source":"exploitdb","id":"EDB-40921","title":"Nagios \u003c 4.2.4 - Local Privilege 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ags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0726","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6209","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-8641","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-12847","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-13441","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-18245","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-13977","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2016-9566","description":"base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file.  NOTE: this can be leveraged by remote attackers using CVE-2016-9565.","status":"published","published":"2016-12-15T22:00:00Z","modified":"2024-08-06T02:50:38.682Z","updated_at":"2026-11-02T14:33:32.103757Z"}],"euvd":[{"id":"EUVD-2016-10372","description":"base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file.  NOTE: this can be leveraged by remote attackers using CVE-2016-9565.","status":"published","published":"2016-12-15T22:00:00Z","modified":"2024-08-06T02:50:38Z","updated_at":"2026-11-03T02:22:26.803486Z"}],"ghsa":[{"id":"GHSA-9332-j4wp-2xcq","title":"base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the...","description":"base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file.  NOTE: this can be leveraged by remote attackers using CVE-2016-9565.","status":"published","published":"2022-05-14T01:45:50Z","modified":"2025-04-12T13:08:35Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T15:01:30.991417Z"}],"nvd":[{"id":"CVE-2016-9566","description":"base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file.  NOTE: this can be leveraged by remote attackers using CVE-2016-9565.","status":"published","published":"2016-12-15T22:59:00.537Z","modified":"2026-06-17T00:56:15.29Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-59","CWE-264"],"updated_at":"2026-11-02T14:03:32.79141Z"}],"osv":[{"id":"CVE-2016-9566","description":"base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file.  NOTE: this can be leveraged by remote attackers using CVE-2016-9565.","status":"published","published":"2016-12-15T22:59:00.537Z","modified":"2026-10-20T10:48:05.014280042Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:03.472693Z"},{"id":"RHSA-2017:0211","title":"Red Hat Security Advisory: nagios security update","status":"published","published":"2024-09-13T14:38:30Z","modified":"2026-06-29T10:15:00Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"RHSA-2017:0212","title":"Red Hat Security Advisory: nagios security update","status":"published","published":"2024-09-13T14:38:16Z","modified":"2026-06-29T10:15:01Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"RHSA-2017:0213","title":"Red Hat Security Advisory: nagios security update","status":"published","published":"2024-09-13T14:38:22Z","modified":"2026-06-29T10:15:01Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"RHSA-2017:0214","title":"Red Hat Security Advisory: nagios security update","status":"published","published":"2024-09-13T14:38:29Z","modified":"2026-06-29T10:15:02Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"RHSA-2017:0258","title":"Red Hat Security Advisory: nagios security update","status":"published","published":"2024-09-13T14:38:44Z","modified":"2026-06-29T10:15:06Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"RHSA-2017:0259","title":"Red Hat Security Advisory: nagios security update","status":"published","published":"2024-09-13T14:38:39Z","modified":"2026-06-29T10:15:06Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"UBUNTU-CVE-2016-9566","description":"base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file.  NOTE: this can be leveraged by remote attackers using CVE-2016-9565.","status":"published","published":"2016-12-15T00:00:00Z","modified":"2026-02-04T04:06:38.956871Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:13.356796Z"},{"id":"DLA-1615-1","title":"nagios3 - security update","status":"published","published":"2018-12-24T00:00:00Z","modified":"2026-03-09T01:18:24.058758Z","updated_at":"2026-11-02T15:46:09.777694Z"},{"id":"DLA-751-1","title":"nagios3 - security update","status":"published","published":"2016-12-16T00:00:00Z","modified":"2026-03-09T02:10:37.50393Z","updated_at":"2026-11-02T15:46:13.207219Z"},{"id":"MGASA-2017-0045","title":"Updated nagios packages fix security vulnerabilities","description":"The nagios package has been patched to fix the following issues:\n\nImproper sanitization of RSS feed input enables unauthenticated remote\nread and write of arbitrary files (CVE-2016-9565).\n\nUnsafe logfile handling allows unprivileged users to escalate their\nprivileges to root (CVE-2016-9566).\n","status":"published","published":"2017-02-11T23:47:14Z","modified":"2026-04-16T06:24:43.336154283Z","updated_at":"2026-11-02T15:49:40.103088Z"},{"id":"openSUSE-SU-2024:11073-1","title":"nagios-4.4.6-2.5 on GA media","description":"These are all security issues fixed in the nagios-4.4.6-2.5 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2025-05-07T18:08:19.000922Z","updated_at":"2026-11-02T16:58:34.894275Z"},{"id":"SUSE-SU-2022:3576-1","title":"Security update for icinga","description":"This update for icinga fixes the following issues:\n\n- CVE-2016-9566: Fixed root privilege escalation (bsc#1014637).\n- CVE-2019-3698: Fixed symbolic link vulnerability that can cause DoS or potentially escalate privileges (bsc#1156309).\n","status":"published","published":"2022-10-13T09:11:52Z","modified":"2026-02-04T04:21:31.18239Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"SUSE-SU-2024:1629-1","title":"Security update for SUSE Manager Client Tools Beta","description":"This update for SUSE Manager Client Tools Beta fixes the following issues:\n\n- Changed codestream origin of SUSE Manager Client Tools Beta (no source changes)\n\nicinga in SUSE Manager Client Tools Beta also received the following security fixes:\n    \n- CVE-2016-9566: Fixed root privilege escalation (bsc#1014637)\n- CVE-2019-3698 : Symbolic Link (Symlink) following\n  vulnerability in the cronjob allows local attackers to cause cause\n  DoS or potentially escalate privileges by winning a race (bsc#1156309)\n","status":"published","published":"2024-05-14T02:28:49Z","modified":"2026-02-04T04:27:07.623229Z","updated_at":"2026-11-02T15:53:54.652421Z"},{"id":"USN-3253-1","title":"nagios3 vulnerabilities","description":"It was discovered that Nagios incorrectly handled certain long strings. A\nremote authenticated attacker could use this issue to cause Nagios to\ncrash, resulting in a denial of service, or possibly obtain sensitive\ninformation. (CVE-2013-7108, CVE-2013-7205)\n\nIt was discovered that Nagios incorrectly handled certain long messages to\ncmd.cgi. A remote attacker could possibly use this issue to cause Nagios to\ncrash, resulting in a denial of service. (CVE-2014-1878)\n\nDawid Golunski discovered that Nagios incorrectly handled symlinks when\naccessing log files. A local attacker could possibly use this issue to\nelevate privileges. In the default installation of Ubuntu, this should be\nprevented by the Yama link restrictions. (CVE-2016-9566)\n","status":"published","published":"2017-04-03T17:42:28Z","modified":"2026-02-10T04:41:06Z","updated_at":"2026-11-02T16:58:10.303275Z"}]}}