Medium severity · published Oct 15, 2026
CVE-2026-111230
Netgate pfSense CE through 2.9.0 Local File Read via Dynamic DNS Update URL
4.9
CVSS
0.8%
EPSS
No
On KEV
Description
Netgate pfSense CE through 2.9.0 contains a local file read vulnerability that allows users with the Dynamic DNS client privilege to read files as root by setting a file:// custom Update URL in services_dyndns_edit.php. Attackers can set a non-matching Result Match string so _checkStatus() logs file contents such as /conf/config.xml or /etc/master.passwd to the system log.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PC
pfSense CE · Netgate
through 2.9.0 · source: vendor
PF
Pfsense · Pfsense
through 2.9.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111230
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111230
Issue Tracking
https://abraxaslabs.tech/research/pfsense-ce-leftovers
Third Party Advisory
https://github.com/abraxas/pfsense-dyndns-file
Product
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/dyndns.class#L2151-L2171
Product
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/etc/inc/dyndns.class#L598-L616
Product
https://github.com/pfsense/pfsense/blob/9363ac5b8651a1c7a333180425ce7719070f95f9/src/usr/local/www/services_dyndns_edit.php#L138-L141
Third Party Advisory
https://www.vulncheck.com/advisories/netgate-pfsense-ce-through-2.9.0-local-file-read-via-dynamic-dns-update-url
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