VulnSocial

CVE-2026-111231

LOWCVSS 8.6 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Netgate pfSense CE through 2.9.0 contains an authorization bypass vulnerability that allows read-only WebGUI users to replace config.xml because config_restore() and config_install() ignore the 'User - Config: Deny Config Write' privilege. Attackers holding page privileges for services_acb.php, uploadconfig.php, diag_confbak.php, or diag_backup.php can install a chosen config.xml to gain root-level code execution after reload or reboot.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-10-16: 110-16
Referenced assets1 URL
Full discourse1 post
  • ThreatAft@ThreatAft

    🔥 pfSense CE: 7 CVEs, peak CVSS 7.5 6 command injection flaws — QinQ, OpenVPN, gateway, Virtual IP, Advanced Admin, Captive Portal — all escalate to root from narrow privileges. CVE-2026-111231: read-only WebGUI users can replace config.xml https://threataft.com/articles/pfsense-ce-cluster-cve-2026-111214-111224-111216-111217-111226-111229-111231

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