Which products and versions are affected by CVE-2022-31814?

Affected: Pfblockerng (Netgate). The full list is in the CVE brief.

Is CVE-2022-31814 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Sep 18, 2024.

Is CVE-2022-31814 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2022-31814?

Public exploit code is available.

Is there a fix for CVE-2022-31814?

Fixed versions are available, including Pfblockerng <=2.1.4_26, Pfblockerng 2.1.4_26.

How urgently should CVE-2022-31814 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2022-31814

Q: What is CVE-2022-31814?

pfSense pfBlockerNG through 2.1.4_26 allows remote attackers to execute arbitrary OS commands as root via shell metacharacters in the HTTP Host header.

Q: How urgently should CVE-2022-31814 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CriticalExploitedPublic exploit

pfSense pfBlockerNG through 2.1.4_26 allows remote attackers to execute arbitrary OS commands as root via shell metacharacters in the HTTP Host header.

Published Sep 5, 2022 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2022-31814 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Pfblockerng (Netgate).
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Sep 18, 2024. Public exploit code is available.
EPSS estimates a 92% probability of exploitation in the next 30 days.
Fixed versions are available, including Pfblockerng <=2.1.4_26, Pfblockerng 2.1.4_26.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

92%

Higher than 99.8% of all scored CVEs

Exploited in the wild

Yes

2 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2022-31814 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

pfSense pfBlockerNG through 2.1.4_26 allows remote attackers to execute arbitrary OS commands as root via shell metacharacters in the HTTP Host header. NOTE: 3.x is unaffected.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Sep 18, 2024	n/a	Not reported
CIRCL KEV	Nov 26, 2025	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
PfblockerngNetgate	See advisory	2.1.4_26

Patched Releases

Pfblockerng

<=2.1.4_26

Timeline

Publicly disclosed
Sep 5, 2022
Added to Industry KEV feed
Sep 18, 2024
Last updated
Nov 21, 2024
Added to CIRCL KEV
Nov 26, 2025

Weakness Type

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

References

10 more references in the full CVE brief

FAQ

Common Questions.

pfSense pfBlockerNG through 2.1.4_26 allows remote attackers to execute arbitrary OS commands as root via shell metacharacters in the HTTP Host header.
Affected: Pfblockerng (Netgate). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Sep 18, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Pfblockerng <=2.1.4_26, Pfblockerng 2.1.4_26.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2022-31814 Running On Your Attack Surface?

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