Back to CVE records
High 8.6Published Jul 2, 2026
CVE-2026-54403A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to bypass authentication of such UniFi OS devices or instances.
Updated under an hour ago ()
Does this affect you?
It affects ui unifi_os_server and 31 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Start free and add your stack
Free account, 1 product
A malicious actor with access to the network could exploit a Path Traversal vulnerability found in certain devices running UniFi OS to bypass authentication of such UniFi OS devices or instances.
- CVSS
- 8.6 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ui unifi_os_server ui:unifi_os_server | through 5.1.15 | NVD |
ui unifi_dream_machine_firmware ui:unifi_dream_machine_firmware | through 5.1.15 | NVD |
ui unifi_dream_machine_pro_firmware ui:unifi_dream_machine_pro_firmware | through 5.1.15 | NVD |
ui unifi_dream_machine_special_edition_firmware ui:unifi_dream_machine_special_edition_firmware | through 5.1.15 | NVD |
ui unifi_dream_machine_pro_max_firmware ui:unifi_dream_machine_pro_max_firmware | through 5.1.15 | NVD |
ui unifi_dream_machine_beast_firmware ui:unifi_dream_machine_beast_firmware | through 5.1.15 | NVD |
ui enterprise_fortress_gateway_firmware ui:enterprise_fortress_gateway_firmware | through 5.1.15 | NVD |
ui unifi_dream_router_firmware ui:unifi_dream_router_firmware | through 5.1.15 | NVD |
ui unifi_dream_wall_firmware ui:unifi_dream_wall_firmware | through 5.1.15 | NVD |
ui unifi_dream_router_7_firmware ui:unifi_dream_router_7_firmware | through 5.1.15 | NVD |
ui unifi_express_7_firmware ui:unifi_express_7_firmware | through 5.1.15 | NVD |
ui unifi_cloudkey_firmware ui:unifi_cloudkey_firmware | through 5.1.15 | NVD |
ui unifi_cloud_key_plus_firmware ui:unifi_cloud_key_plus_firmware | through 5.1.15 | NVD |
ui unifi_cloudkey_enterprise_firmware ui:unifi_cloudkey_enterprise_firmware | through 5.1.15 | NVD |
ui unifi_network_video_recorder_firmware ui:unifi_network_video_recorder_firmware | through 5.1.15 | NVD |
ui unifi_network_video_recorder_pro_firmware ui:unifi_network_video_recorder_pro_firmware | through 5.1.15 | NVD |
ui unifi_network_video_recorder_instant_firmware ui:unifi_network_video_recorder_instant_firmware | through 5.1.15 | NVD |
ui enterprise_network_video_recorder_firmware ui:enterprise_network_video_recorder_firmware | through 5.1.15 | NVD |
ui enterprise_network_video_recorder_core_firmware ui:enterprise_network_video_recorder_core_firmware | through 5.1.15 | NVD |
ui unifi_network_video_recorder_g2_firmware ui:unifi_network_video_recorder_g2_firmware | through 5.1.15 | NVD |
ui unifi_network_video_recorder_g2_pro_firmware ui:unifi_network_video_recorder_g2_pro_firmware | through 5.1.15 | NVD |
ui unifi_cloud_gateway_ultra_firmware ui:unifi_cloud_gateway_ultra_firmware | through 5.1.15 | NVD |
ui unifi_cloud_gateway_max_firmware ui:unifi_cloud_gateway_max_firmware | through 5.1.15 | NVD |
ui unifi_cloud_gateway_industrial_firmware ui:unifi_cloud_gateway_industrial_firmware | through 5.1.15 | NVD |
ui unifi_cloud_gateway_fiber_firmware ui:unifi_cloud_gateway_fiber_firmware | through 5.1.15 | NVD |
ui unas_2_firmware ui:unas_2_firmware | through 5.1.16 | NVD |
ui unas_4_firmware ui:unas_4_firmware | through 5.1.16 | NVD |
ui unas_pro_firmware ui:unas_pro_firmware | through 5.1.16 | NVD |
ui unas_pro_4_firmware ui:unas_pro_4_firmware | through 5.1.16 | NVD |
ui unas_pro_8_firmware ui:unas_pro_8_firmware | through 5.1.16 | NVD |
ui enterprise_firewall_core_firmware ui:enterprise_firewall_core_firmware | through 5.1.18 | NVD |
ui unifi_dream_router_5g_max_firmware ui:unifi_dream_router_5g_max_firmware | through 5.1.15 | NVD |
References
- https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afcvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.