Critical [CVE-2026-77536] UniFi OS Server: malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances
This critical-severity Ubiquiti advisory covers CVE-2026-77536 affecting UniFi OS Server.
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Summary
A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.
Affected product named by the advisory: UniFi OS Server.
- UniFi OS Server before 5.1.37
- Cloud Keys before 5.1.31
- Network Video Recorders before 5.1.31
- Enterprise Network Video Recorders before 5.1.31
- Enterprise Network Attached Storage before 5.1.31
- Dream Machines before 5.1.31
- Enterprise Firewall Core before 5.1.31
- Dream Routers before 5.1.31
- Enterprise Fortress Gateway before 5.1.31
- Cloud Gateways before 5.1.31
- Dream Wall before 5.1.31
- Express 7 before 5.1.31
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
- 5.1.37
- 5.1.31
- 5.1.32
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 5.1.37, 5.1.31, 5.1.32. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
Discussion(0)
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