October 22, 2026

CVE Watchtower

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CVE-2026-54402NVD

Vulnerability Summary

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.
Severity Level
CRITICAL(9.9)
Published Date
Jul 2, 2026
Last Modified
Jul 10, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
1.31%Probability
Root Weakness (CWE)
CWE-20: Improper Input Validation ↗
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required.
CWE-77: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 9.9 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Ui Unifi Os Server <= 5.1.15
  • Ui Unifi Dream Machine Firmware <= 5.1.15
  • Ui Unifi Dream Machine Pro Firmware <= 5.1.15
  • Ui Unifi Dream Machine Special Edition Firmware <= 5.1.15
  • Ui Unifi Dream Machine Pro Max Firmware <= 5.1.15
  • Ui Unifi Dream Machine Beast Firmware <= 5.1.15
  • Ui Enterprise Fortress Gateway Firmware <= 5.1.15
  • Ui Unifi Dream Router Firmware <= 5.1.15
  • Ui Unifi Dream Wall Firmware <= 5.1.15
  • Ui Unifi Dream Router 7 Firmware <= 5.1.15
  • Ui Unifi Express 7 Firmware <= 5.1.15
  • Ui Unifi Cloudkey Firmware <= 5.1.15
  • Ui Unifi Cloud Key Plus Firmware <= 5.1.15
  • Ui Unifi Cloudkey Enterprise Firmware <= 5.1.15
  • Ui Unifi Network Video Recorder Firmware <= 5.1.15
  • Ui Unifi Network Video Recorder Pro Firmware <= 5.1.15
  • Ui Unifi Network Video Recorder Instant Firmware <= 5.1.15
  • Ui Enterprise Network Video Recorder Core Firmware <= 5.1.15
  • Ui Unifi Network Video Recorder G2 Firmware <= 5.1.15
  • Ui Unifi Network Video Recorder G2 Pro Firmware <= 5.1.15
  • Ui Unifi Cloud Gateway Ultra Firmware <= 5.1.15
  • Ui Unifi Cloud Gateway Max Firmware <= 5.1.15
  • Ui Unifi Cloud Gateway Industrial Firmware <= 5.1.15
  • Ui Unifi Cloud Gateway Fiber Firmware <= 5.1.15
  • Ui Unas 2 Firmware <= 5.1.16
  • Ui Unas 4 Firmware <= 5.1.16
  • Ui Unas Pro Firmware <= 5.1.16
  • Ui Unas Pro 4 Firmware <= 5.1.16
  • Ui Unas Pro 8 Firmware <= 5.1.16
  • Ui Enterprise Firewall Core Firmware <= 5.1.18
  • Ui Unifi Dream Router 5g Max Firmware <= 5.1.15
  • Ui Enterprise Network Video Recorder Firmware <= 5.1.15
Patched Versions
Not provided by NVD for this CVE.
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🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References