OPNsense has 12 CVEs on record. Disclosure cadence is accelerating: 12 in the last 90 days against 0 in the 90 before. The busiest recent month was October 2026 with 11. The median CVSS is 6.5 (medium), with 2 rated critical. None have a confirmed exploitation report. The dominant weakness classes are CWE-79 (4) and CWE-22 (3). Most affected products: core (11), OPNsense firewall (1).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 0% vs 1% corpus
- Median CVSS
- 6.5
- Publish → KEV
- —
- Last 90 days
- 12 prev 0
Worst active — by depth score
CVE-2026-57155Critical· 9.9OPNsense is a FreeBSD based firewall and routing platform67CVE-2026-53581Critical· 9.0OPNsense is a FreeBSD based firewall and routing platform62CVE-2026-58390High· 8.0OPNsense is a FreeBSD based firewall and routing platform56CVE-2026-71490High· 7.1OPNsense is a FreeBSD based firewall and routing platform51CVE-2026-53582High· 7.1OPNsense is a FreeBSD based firewall and routing platform51
OPNsense vulnerabilities
CVEs affecting OPNsense, newest first. Open any entry for full detail, references, and exploit status.
12 CVEsRSS
CVE-2026-115425Medium· 5.6Multiple cross-site scripting (XSS) in OPNsense
Multiple cross site scripting (XSS) vulnerabilities affect OPNsense firewall vesrion 26.7.1_1 and earlier allows low privileged attacker to execute Javascript in the context of another user visiting a specific page or clicking on a speci…
CVE-2026-53582High· 7.1PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.10, the Trust module stores attacker-controlled certificate authority and certificate refid values and interpolates them into XPath expressions in src/opnse…
CVE-2026-58391Medium· 5.4PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, Firewall Rules and NAT views place stored category names and alias descriptions into HTML title attributes in filter_rule.volt and nat_rule.volt without…
CVE-2026-58393Medium· 5.9PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the OpenVPN Client Specific Override common_name field accepts path traversal sequences and openvpn_csc_conf_write() concatenates the value into /var/et…
CVE-2026-58395Medium· 4.3PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the safe-delete path reached through ApiMutableModelControllerBase::delBase() interpolates an unvalidated safe-delete token from the request URL into an…
CVE-2026-58390High· 8.0PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the OpenVPN connection-status dashboard widget in src/opnsense/www/js/widgets/OpenVPNClients.js and the connection-status view place a client common_nam…
CVE-2026-58394Medium· 5.2PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, src/www/system_advanced_admin.php reads certificate records into $a_cert but omits that array from legacy_html_escape_form_data() before rendering each …
CVE-2026-63442High· 8.1OPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the unauthenticated WebGUI login usernamefld accepts carriage-return and line-feed characters that survive LOG_AUTH processing through syslog-ng-lockout…
CVE-2026-57155Critical· 9.9PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the Firewall Alias GeoIP importer's process_zip() and process_gzip() paths in src/opnsense/scripts/filter/lib/alias/geoip.py use an unvalidated CSV coun…
CVE-2026-71490High· 7.1PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.11, OPNsense\Core\ACL::hasPrivilege() appends a directly assigned comma-separated <priv> value as one string and then uses an exact comparison when checking user-co…
CVE-2026-58392Medium· 5.4PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the NTP GPS page stores the operator-supplied initcmd value in base64 form, applies legacy_html_escape_form_data() to the encoded string, and then uses …
CVE-2026-53581Critical· 9.0PoCOPNsense is a FreeBSD based firewall and routing platform
OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.9 of opnsense/core and version 26.4_20 of BE/opnsense/core, a path traversal vulnerability in the NTP configuration module allows an attacker to overwrite a…