Vulnerability · CVE-2026-2043
Nagios Host esensors_websensor_configwizard_func Command Injection Remote Code Execution Vulnerability.
Published Feb 20, 2026 · catalog updated Jun 17, 2026 · nagios xi
Check this week
CVE-2026-2043 is not in CISA KEV. FIRST estimates a 74.22% chance of exploitation in the next 30 days. Check whether you run nagios xi.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High8.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 74.22%
- Remediation
- Advisory link
- Affected products
- cpe nagios/nagios xi
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. The 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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe nagios/nagios xi2026
How to fix CVE-2026-2043
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2026-2043 is not in CISA KEV. FIRST estimates a 74.22% chance of exploitation in the next 30 days. Check whether you run nagios xi.
Which versions are affected?
Compare what you have installed with nagios/nagios xi 2026. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-78: OS Command Injection. EPSS 74.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 20, 2026 · NIST NVD
Detected
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. The specific flaw exists within the esensors_websensor_configwizard_func method. The issue results from the lack of proper vali
Jun 17, 2026 · NIST NVD
Updated
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. The specific flaw exists within the esensors_websensor_configwizard_func method. The issue results from the lack of proper vali
Sources
- CVE.orgVulnerability recordCVE-2026-2043
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-2043
30-day exploitation probability 74.2%
first.org - NIST NVDVulnerability recordCVE-2026-2043
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. The sp
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.