CVE-2026-54402: exploitation status and patch state

CVE-2026-54402 · CVSS 9.9 CRITICAL · EPSS 1%

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.

Is CVE-2026-54402 exploited?

• Not in the CISA KEV catalog.
• EPSS puts exploitation in the next 30 days at 1%.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

No patch identifier recorded here yet.

What PlainSec published about CVE-2026-54402

• ShareFile Shutdown Signals More Than Maintenance (2026-07-13)
• Partial UniFi Patching Leaves the Stack Exposed (2026-07-09)

Primary sources

• NVD record

What this record does not say

• No affected package data.
• No patch identifier.

KEV and EPSS are re-checked daily. Record last updated 2026-08-12.