Vulnerability in Netgate Pfsense Ce
CVE-2026-111223
Netgate pfSense CE 2.7.0 through 2.9.0 contains a configuration injection vulnerability that allows authenticated users with IPsec Mobile privileges to execute commands as root via the login_banner field. Attackers can submit a single-line banner containing '}' to escape the unquoted strongswan.conf attr value and define charon.start-scripts entries that charon executes as root on restart.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/abraxas/pfsense-ipsec-login-banner (technical-description, exploit)
- abraxaslabs.tech/research/pfsense-ce-leftovers (technical-description)
- abraxaslabs.tech/research/pfsense-ipsec-login-banner (technical-description)
- github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/et… (technical-description)
- github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/et… (technical-description)
- github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/us… (technical-description)
- github.com/pfsense/pfsense/commit/27a52d0807 (technical-description, patch)
- www.vulncheck.com/advisories/netgate-pfsense-ce-2.7.0-through-2.9.0-command-inj… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111223?
- CVE-2026-111223 is a high-severity vulnerability in Netgate Pfsense Ce, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2026-10-15.
- How severe is CVE-2026-111223?
- High severity. CVSS v3 base score is 7.2 out of 10.