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CVE-2026-47370 Ubiquiti Inc CVE debrief

CVE-2026-47370 is a CRITICAL vulnerability with a CVSS score of 9.9. A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in certain devices running UniFi OS to execute a Command Injection within such UniFi OS devices or instances. The vulnerability was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-47370) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-47370).

Vendor
Ubiquiti Inc
Product
UniFi OS Server
CVSS
CRITICAL 9.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-12
Advisory published
2026-06-12
Advisory updated
2026-06-12

Who should care

Administrators and users of UniFi OS devices should be aware of this vulnerability and take immediate action to mitigate the risk.

Technical summary

The vulnerability is caused by Improper Input Validation in UniFi OS devices. This allows a malicious actor with low privileges and network access to inject commands.

Defensive priority

CRITICAL

Recommended defensive actions

  • Apply patches or updates provided by the vendor as soon as possible.
  • Restrict network access to UniFi OS devices to minimize the attack surface.
  • Monitor UniFi OS devices for suspicious activity.

Evidence notes

The CVE record [cve-org] and NVD detail [nvd] provide official information about the vulnerability. A security advisory bulletin [ref-4] is also available from the vendor.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47370 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47370

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47370 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47370

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://community.ui.com/releases/Security-Advisory-Bulletin-065-065/aa46a22b-fc43-4eae-9382-6fc8feda967a

    [email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.