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Public proof of conceptFix available

CVE-2022-40624

A public proof of concept exists; no exploitation attested.

  • Published2022-12-20
  • Fixed in2.1.4_27
  • WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2022-12-2015:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-40624?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-40624?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Pfsense pfblockerng
BranchAffectedFixed in
2.1< 2.1.4_272.1.4_27

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Pfsense pfblockerng to 2.1.4_27

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
2 repositories, unverifieddhammon/pfBlockerNg-CVE-2022-40624krevetkqqq/CVE-2022-40624
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-12-20
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-crg2-7qxv-74jh

Frequently asked questions

What is CVE-2022-40624?

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.

Is CVE-2022-40624 actively exploited?

A proof-of-concept exploit exists for CVE-2022-40624, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2022-40624?

CVE-2022-40624 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Same product first, then the same vendor advisory and the same publication week.

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Sources for this record