{"id":"CVE-2026-2043","published":"2026-02-20T22:22:06Z","modified":"2026-02-26T14:44:12Z","title":"Nagios Host esensors_websensor_configwizard_func Command Injection Remote Code Execution Vulnerability","vendor":"Nagios","product":"Host","tier":"core","eol":null,"affectedVersions":[{"vendor":"Nagios","product":"Host","versions":["2026R1"]}],"description":{"text":"Nagios Host esensors_websensor_configwizard_func Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Nagios Host. Authentication is required to exploit this vulnerability.\n\nThe specific flaw exists within the esensors_websensor_configwizard_func method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-28249.","provenance":"source","from":"CVE.org"},"summary":{"text":"The Nagios Host product contains a command injection flaw in its esensors_websensor_configwizard_func method, where a user-supplied string is passed to a system call without proper validation. An attacker with valid credentials and network access to the affected installation can exploit it to execute arbitrary code in the context of the service account.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T07:16:09Z"},"cvss":{"score":7.2,"severity":"HIGH","version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.75421,"percentile":0.99515,"date":"2026-10-30","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":{"pulseCount":1,"pulses":[{"name":"Known_Cve | Mar 1, 2026","url":"https://otx.alienvault.com/pulse/69a37f26f98d70830ee771e3","created":"2026-02-28"}],"provenance":"machine"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-26-072/","tags":["x_research-advisory"]},{"url":"https://www.nagios.com/changelog/nagios-xi/nagios-xi-2026r1-0-1/","tags":["vendor-advisory"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-7770","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-7770","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2026-02-20","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2026-2043","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":25.6,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.9,"detail":"percentile 0.9951"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":0.68,"detail":"1 pulse"},{"name":"CVSS severity","points":5.04,"detail":"base score 7.2"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}