CVE-2026-55110 | Ubiquiti UniFi OS Server prior 5.1.19 cross-domain policy

A vulnerability categorized as critical has been discovered in Ubiquiti UniFi OS Server, Dream Machines, Enterprise Fortress Gateway, Dream Wall, Dream Routers, Express 7, Cloud Keys, Network Video Recorders, Enterprise Video Recorders, Cloud Gateways, Network Attached Storage and Enterprise Firewall Core. This vulnerability affects unknown code. Such manipulation leads to permissive cross-domain policy with untrusted domains.

This vulnerability is referenced as CVE-2026-55110. It is possible to launch the attack remotely. No exploit is available.

It is advisable to upgrade the affected component.VulDB Recent EntriesRead More