Is there a public exploit for CVE-2026-119742?

No public exploit for CVE-2026-119742 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-119742?

CVE-2026-119742 scores CVSS 8.6 (v4.0), rated high.

What does CVE-2026-119742 affect?

CVE-2026-119742 affects Nagios Enterprises, LLC Nagios XI.

8.6 High

Nagios XI before 2026R2 contains an OS command injection vulnerability in the MIB upload feature where the installmib() function in…

CVE-2026-119742

Nagios XI before 2026R2 contains an OS command injection vulnerability in the MIB upload feature where the installmib() function in mibs.php sanitizes uploaded filenames with an incomplete character-substitution filter that omits semicolons, pipes, and non-space IFS whitespace characters before passing them to a grep command run via exec(). An authenticated administrator can upload a MIB file with a crafted filename using tab characters to bypass the deny-list and pipe to sh via a multipart POST request to mibs.php, resulting in arbitrary OS command execution as the web server user.

Assessment

CVSS: 8.6 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 3 November 2026
Last updated: 3 November 2026
Affected: Nagios Enterprises, LLC · Nagios XI
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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