🛡️ CVE-2026-55110 — enterprise-firewall-core-firmware

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-942 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2026-55110 is recorded against 30 packages.

  • enterprise-firewall-core-firmware (fixed in 5.1.18)
  • enterprise-fortress-gateway-firmware (fixed in 5.1.15)
  • enterprise-network-video-recorder-core-firmware (fixed in 5.1.15)
  • enterprise-network-video-recorder-firmware (fixed in 5.1.15)
  • unas-2-firmware (fixed in 5.1.16)
  • unas-4-firmware (fixed in 5.1.16)
  • unas-pro-4-firmware (fixed in 5.1.16)
  • unas-pro-8-firmware (fixed in 5.1.16)
  • unas-pro-firmware (fixed in 5.1.16)
  • unifi-cloud-gateway-fiber-firmware (fixed in 5.1.15)
  • unifi-cloud-gateway-industrial-firmware (fixed in 5.1.15)
  • unifi-cloud-gateway-max-firmware (fixed in 5.1.15)
  • unifi-cloud-gateway-ultra-firmware (fixed in 5.1.15)
  • unifi-cloud-key-plus-firmware (fixed in 5.1.15)
  • unifi-cloudkey-enterprise-firmware (fixed in 5.1.15)
  • unifi-cloudkey-firmware (fixed in 5.1.15)
  • unifi-dream-machine-beast-firmware (fixed in 5.1.15)
  • unifi-dream-machine-pro-firmware (fixed in 5.1.15)
  • unifi-dream-machine-pro-max-firmware (fixed in 5.1.15)
  • unifi-dream-machine-special-edition-firmware (fixed in 5.1.15)
  • unifi-dream-router-7-firmware (fixed in 5.1.15)
  • unifi-dream-router-firmware (fixed in 5.1.15)
  • unifi-dream-wall-firmware (fixed in 5.1.15)
  • unifi-express-7-firmware (fixed in 5.1.15)
Show the remaining 6 packages
  • unifi-network-video-recorder-firmware (fixed in 5.1.15)
  • unifi-network-video-recorder-g2-firmware (fixed in 5.1.15)
  • unifi-network-video-recorder-g2-pro-firmware (fixed in 5.1.15)
  • unifi-network-video-recorder-instant-firmware (fixed in 5.1.15)
  • unifi-network-video-recorder-pro-firmware (fixed in 5.1.15)
  • unifi-os-server (fixed in 5.1.15)

Timeline and source

Published on 2 July 2026 and last revised on 9 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

community.ui.com

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE CWE-942
Public Exploit ✅ No
Source NVD
Published 2026-07-02
Updated 2026-08-11
Modified 2026-07-09
Fix URL N/A

Affected Packages

Software From version Fixed in
enterprise-firewall-core-firmware 5.1.18
enterprise-fortress-gateway-firmware 5.1.15
enterprise-network-video-recorder-core-firmware 5.1.15
enterprise-network-video-recorder-firmware 5.1.15
unas-2-firmware 5.1.16
unas-4-firmware 5.1.16
unas-pro-4-firmware 5.1.16
unas-pro-8-firmware 5.1.16
unas-pro-firmware 5.1.16
unifi-cloud-gateway-fiber-firmware 5.1.15
unifi-cloud-gateway-industrial-firmware 5.1.15
unifi-cloud-gateway-max-firmware 5.1.15
unifi-cloud-gateway-ultra-firmware 5.1.15
unifi-cloud-key-plus-firmware 5.1.15
unifi-cloudkey-enterprise-firmware 5.1.15
unifi-cloudkey-firmware 5.1.15
unifi-dream-machine-beast-firmware 5.1.15
unifi-dream-machine-pro-firmware 5.1.15
unifi-dream-machine-pro-max-firmware 5.1.15
unifi-dream-machine-special-edition-firmware 5.1.15
unifi-dream-router-7-firmware 5.1.15
unifi-dream-router-firmware 5.1.15
unifi-dream-wall-firmware 5.1.15
unifi-express-7-firmware 5.1.15
unifi-network-video-recorder-firmware 5.1.15
unifi-network-video-recorder-g2-firmware 5.1.15
unifi-network-video-recorder-g2-pro-firmware 5.1.15
unifi-network-video-recorder-instant-firmware 5.1.15
unifi-network-video-recorder-pro-firmware 5.1.15
unifi-os-server 5.1.15

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