CVE-2026-34910
Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.
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A critical command injection vulnerability with a CVSS score of 10.0 has been identified in UniFi OS devices. An attacker with network access can exploit improper input validation to execute arbitrary commands, potentially compromising the entire network management layer.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HCWE-20CISA KEV
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS
Affects
ui:unifi_os_serverui:unifi_cloud_gateway_industrial_firmwareui:unifi_cloud_gateway_industrialui:unifi_dream_machine_firmwareui:unifi_dream_machineui:unifi_dream_machine_pro_firmwareui:unifi_dream_machine_proui:unifi_dream_machine_special_edition_firmwareui:unifi_dream_machine_special_editionui:unifi_dream_machine_pro_max_firmwareui:unifi_dream_machine_pro_maxui:enterprise_fortress_gateway_firmwareui:enterprise_fortress_gatewayui:unifi_dream_wall_firmwareui:unifi_dream_wallui:unifi_dream_router_firmwareui:unifi_dream_routerui:unifi_dream_router_7_firmwareui:unifi_dream_router_7ui:unifi_express_7_firmwareui:unifi_express_7ui:unifi_network_video_recorder_firmwareui:unifi_network_video_recorderui:unifi_network_video_recorder_pro_firmwareui:unifi_network_video_recorder_proui:unifi_network_video_recorder_instant_firmwareui:unifi_network_video_recorder_instantui:enterprise_network_video_recorder_firmwareui:enterprise_network_video_recorderui:unifi_cloud_gateway_ultra_firmwareui:unifi_cloud_gateway_ultraui:unifi_cloud_gateway_max_firmwareui:unifi_cloud_gateway_maxui:unifi_cloud_gateway_fiber_firmwareui:unifi_cloud_gateway_fiberui:unifi_dream_router_5g_max_firmwareui:unifi_dream_router_5g_maxui:enterprise_network_video_recorder_core_firmwareui:enterprise_network_video_recorder_coreui:unifi_cloud_key_plus_firmwareui:unifi_cloud_key_plusui:unifi_cloudkey_firmwareui:unifi_cloudkeyui:unifi_cloudkey_enterprise_firmwareui:unifi_cloudkey_enterpriseui:unifi_network_video_recorder_g2_firmwareui:unifi_network_video_recorder_g2ui:unifi_network_video_recorder_g2_pro_firmwareui:unifi_network_video_recorder_g2_proui:unifi_dream_machine_beast_firmwareui:unifi_dream_machine_beastui:unas_2_firmwareui:unas_2ui:unas_4_firmwareui:unas_4ui:unas_pro_firmwareui:unas_proui:unas_pro_4_firmwareui:unas_pro_4ui:unas_pro_8_firmwareui:unas_pro_8Technical description
A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.