Is there a public exploit for CVE-2026-119423?

No public exploit for CVE-2026-119423 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-2026-119423?

CVE-2026-119423 scores CVSS 6.9 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.38%.

What does CVE-2026-119423 affect?

CVE-2026-119423 affects OPNsense core.

6.9 Medium

OPNsense core before 26.7.8 contains a log injection vulnerability that allows unauthenticated attackers to plant victim IP addresses in…

CVE-2026-119423

OPNsense core before 26.7.8 contains a log injection vulnerability that allows unauthenticated attackers to plant victim IP addresses in the lockouthandler by submitting crafted WebGUI login usernames. Attackers can submit usernames like 'Invalid user ' repeatedly to add the victim to the sshlockout table, blocking SSH and WebGUI access and killing its pf states.

Assessment

CVSS: 6.9 (v4.0)
Severity: Medium
EPSS: 0.38% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 4 November 2026
Affected: OPNsense · core
Assigner: VulnCheck

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

At the source

EUVD (ENISA)

References

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