🛡️ CVE-2026-54402 — enterprise-firewall-core-firmware

🔴 CVSS 9.9 — Critical ✅ No Known Exploit CWE-20 NVD
9.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-54402 is classified as CWE-20: Improper Input Validation. The application accepts input without checking that it has the expected form, so malformed values reach code that assumes they are well formed.

Affected software

CVE-2026-54402 is recorded against 32 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-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-5g-max-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)
Show the remaining 8 packages
  • unifi-dream-wall-firmware (fixed in 5.1.15)
  • unifi-express-7-firmware (fixed in 5.1.15)
  • 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 10 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

community.ui.com

Details

Severity CRITICAL
CVSS Score 9.9
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE CWE-20
Public Exploit ✅ No
Source NVD
Published 2026-07-02
Updated 2026-08-11
Modified 2026-07-10
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-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-5g-max-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

Similar Threats

Exploit Protection

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