{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-54402: A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-54402","status":"final","version":"1","initial_release_date":"2026-07-02T14:49:17.030Z","current_release_date":"2026-07-02T15:52:04.606Z","revision_history":[{"date":"2026-07-02T14:49:17.030Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-54402 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-54402"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-54402"},{"category":"external","summary":"community.ui.com","url":"https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc"}]},"product_tree":{"branches":[{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"UniFi OS Server","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc UniFi OS Server <5.1.19","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:unifi_os_server:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Dream 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<5.1.19","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:dream_wall:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Dream Routers","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Dream Routers <5.1.19","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:dream_routers:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Express 7","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Express 7 <5.1.19","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:express_7:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Cloud Keys","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Cloud Keys <5.1.19","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:cloud_keys:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Network Video Recorders","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Network Video Recorders <5.1.19","product_id":"CSAFPID-8","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:network_video_recorders:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Enterprise Video Recorders","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Enterprise Video Recorders <5.1.19","product_id":"CSAFPID-9","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:enterprise_video_recorders:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Cloud Gateways","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Cloud Gateways <5.1.19","product_id":"CSAFPID-10","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:cloud_gateways:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Network Attached Storage","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Network Attached Storage <5.1.19","product_id":"CSAFPID-11","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:network_attached_storage:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Ubiquiti Inc","branches":[{"category":"product_name","name":"Enterprise Firewall Core","branches":[{"category":"product_version_range","name":"<5.1.19","product":{"name":"Ubiquiti Inc Enterprise Firewall Core <5.1.19","product_id":"CSAFPID-12","product_identification_helper":{"cpe":"cpe:2.3:a:ubiquiti_inc:enterprise_firewall_core:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-54402","title":"A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device","notes":[{"category":"description","text":"A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi OS to execute a Command Injection on the host device.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11","CSAFPID-12"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":9.9,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11","CSAFPID-12"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 5.1.19.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11","CSAFPID-12"]}]}]}