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CVE-2022-40624

CriticalPublished

pfSense pfBlockerNG through 2.1.4_27 allows remote attackers to execute arbitrary OS commands as root via the HTTP Host header, a different vulnerability...

Published: Dec 20, 2022
Updated: Apr 17, 2025
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

17.1%

Moderate · next 30 days

Percentile: 97.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

pfSense pfBlockerNG through 2.1.4_27 allows remote attackers to execute arbitrary OS commands as root via the HTTP Host header, a different vulnerability than CVE-2022-31814.

Sources

pfBlockerNg-CVE-2022-40624PoC
Proof-of-concept exploit for unauthenticated remote code execution in pfBlockerNg via unsanitized input in the DNSBL TLD query function, with SAST detection analysis.

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