CVE-2026-54402: ubiquiti inc cloud gateways Improper Input Validation
CVSS: 9.9v3.1CriticalAnalyzed
Published 02-07-2026Last modified 02-07-2026
Vulnerability summary
CVE-2026-54402 is a critical (CVSS 9.9) Improper Input Validation vulnerability in ubiquiti inc cloud gateways. EPSS estimates a 1.76% chance of exploitation in the next 30 days, higher than 77.6% of scored vulnerabilities.
CVSS score
9.9/10
010
Critical · v3.1 (CVE.org)EPSS score
1.76%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 02-07-2026PublishedVulnerability first disclosed.
- 02-07-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.9Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HSources2 sources · 8.8–9.9
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
1.76%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
0.00 pp
From 1.76% on 19-09-2026
19-09-202619-10-2026
EPSS score1.76%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
Affected systems
Ui32 products
- enterprise_firewall_core_firmware≤ 5.1.18
- enterprise_fortress_gateway_firmware≤ 5.1.15
- enterprise_network_video_recorder_firmware≤ 5.1.15
- enterprise_network_video_recorder_core_firmware≤ 5.1.15
- unas_2_firmware≤ 5.1.16
Ubiquiti inc12 products
- cloud gateways< 5.1.19
- cloud keys< 5.1.19
- dream machines< 5.1.19
- dream routers< 5.1.19
- dream wall< 5.1.19
2 vendors · 44 products