CVE-2026-111217: Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated user

Q: How do I fix CVE-2026-111217?

pfsense: upgrade to newer than 2.9.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-111217 being exploited?

CVE-2026-111217 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-111217 affect?

CVE-2026-111217 affects pfsense. Severity is high (CVSS 7.2). Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with Virtual IP edit privileges to execute commands as root by storing an unvalidated CARP VHID. Attackers can supply a VHID con

Q: How urgent is CVE-2026-111217?

Priority 54/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

This month

HIGH 7.2UPGRADE

CVE-2026-111217 is a high-severity flaw (CVSS 7.2) affecting pfsense. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with Virtual IP edit privileges to execute commands as root by storing an unvalidated CARP VHID. Attackers can supply a VHID containing shell metacharacters that executes via interface_ipalias_configure() ifconfig calls or get_carp_interface_status() when CARP status is rendered.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	7.0% (top 6%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-10-15
Last modified	2026-10-21

Publisher (CNA): VulnCheck · Vendor: pfsense

Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-15 19:17 UTCPublished CVE record published
2026-10-21 01:17 UTCUpdated Record last modified

pfsense pfsense UPGRADE

Affected: <= 2.9.0

Fixed in: newer than 2.9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pfsense || rpm -q pfsense || pfsense --version

2. UPGRADE to newer than 2.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pfsense

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pfsense

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · edk2 · FIXED · 20260812-12.eln159 · FEDORA-2026-e316b6370a · source

sudo dnf upgrade --advisory=FEDORA-2026-e316b6370a

Fedora 46 · perl-Mojo-DOM58 · FIXED · 3.003-1.fc46 · FEDORA-2026-d5412af3de · source

sudo dnf upgrade --advisory=FEDORA-2026-d5412af3de

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-111217?

pfsense: upgrade to newer than 2.9.0. Exact commands for each OS are on this page.

Is CVE-2026-111217 being exploited?

CVE-2026-111217 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-111217 affect?

CVE-2026-111217 affects pfsense. Severity is high (CVSS 7.2). Netgate pfSense CE through 2.9.0 contains an OS command injection vulnerability that allows authenticated users with Virtual IP edit privileges to execute commands as root by storing an unvalidated CARP VHID. Attackers can supply a VHID con

How urgent is CVE-2026-111217?

Priority 54/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Software pages

pfSense and OPNsense vulnerabilities

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References

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