🛡️ CVE-2026-55110 — enterprise-firewall-core-firmware
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
Details
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
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 |
References
Similar Threats
- High CVE-2026-54401
- Critical CVE-2026-54402
- High CVE-2026-54403
- High CVE-2026-54404
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
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