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Opnsense

18 known vulnerabilities

3
CRITICAL
2
HIGH
13
MEDIUM

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opnsense 18
18 CVEs
9.1
CVE-2026-45158

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, unsanitized user input is passed to the DHCP

5.3
CVE-2026-44195

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, a logic flaw in the OPNsense lockout_handler

9.1
CVE-2026-44194

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE)

9.1
CVE-2026-44193

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, the XMLRPC method opnsense.restore_config_se

8.2
CVE-2026-34578

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.6, OPNsense's LDAP authentication connector pas

6.3
CVE-2026-30868

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.4, multiple OPNsense MVC API endpoints perform

5.4
CVE-2019-25377

OPNsense 19.1 contains a reflected cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that al

6.1
CVE-2019-25376

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject ma

6.1
CVE-2019-25375

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject ma

6.1
CVE-2019-25374

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows attackers to inject malicious scripts

6.4
CVE-2019-25373

OPNsense 19.1 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicio

6.1
CVE-2019-25372

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject ma

6.1
CVE-2019-25371

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject ma

6.1
CVE-2019-25370

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows attackers to inject malicious scripts

6.4
CVE-2019-25369

OPNsense 19.1 contains a stored cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allow

5.4
CVE-2019-25368

OPNsense 19.1 contains multiple cross-site scripting vulnerabilities in the diag_backup.php endpoint that allow attacker

6.5
CVE-2018-18958

OPNsense 18.7.x before 18.7.7 has Incorrect Access Control.

7.2
CVE-2019-11816

Incorrect access control in the WebUI in OPNsense before version 19.1.8, and pfsense before 2.4.4-p3 allows remote authe

Frequently Asked Questions

How many CVEs affect Opnsense?

Opnsense has 18 CVE records in our database, including 3 critical and 2 high severity vulnerabilities.

What are the most severe Opnsense vulnerabilities?

Opnsense has 3 critical severity (CVSS 9.0+) and 2 high severity (CVSS 7.0-8.9) vulnerabilities. Review the list above sorted by publication date to find the most recent high-severity issues.

How can I scan for Opnsense vulnerabilities?

CyberStrike's AI-powered security agents automatically detect vulnerabilities in Opnsense products across your infrastructure. The platform provides continuous pentesting, DAST scanning, and real-time vulnerability monitoring with actionable remediation guidance.

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