Root RCE via OPNsense WebGUI/API in a widely deployed firewall OS plugin; can fully compromise network perimeter devices and is organization-impacting.
CVE-2026-123025
Authenticated WebGUI RCE as root via OPNsense os-acme-client Google Cloud DNS plugin.
Is CVE-2026-123025 being exploited?
Not confirmed. CVE-2026-123025 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-123025?
CVE-2026-123025 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-123025?
Not known from our data. No patch reference has been recorded for CVE-2026-123025, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-123025 affect?
CVE-2026-123025 affects OPNsense os-acme-client plugin <= 4.17, OPNsense firewall/router (WebGUI/API), Instances using Google Cloud DNS validation module. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-123025?
Restrict admin access, disable os-acme-client GCloud DNS validation, and apply vendor patch ASAP.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker issuing/renewing certs can execute arbitrary shell commands as root via the WebGUI/API.
Immediate action required
- affected<= 4.17.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
timeline
- 5 Nov 2026Published
- 5 Nov 2026CVE record last updated · same day later
- 6 Nov 2026Analysed by vulneraibility.com · 1 day later
- Linkgithub.com /opnsense/plugins/pull/5873
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.