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CVE-2026-77537 – Critical Unauthenticated Command Injection (RCE) – Ubiquiti UniFi Protect Applicati

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Summary

CVE-2026-77537 is a critical improper input validation vulnerability (CWE-20) in the Ubiquiti UniFi Protect Application that allows a network-based attacker to execute command injection on the underlying host device. The flaw affects all UniFi Protect Application versions prior to 7.2.105 and carries a maximum CVSS v3.1 base score of 10.0, requiring no authentication or user interaction to exploit.

Technical details

  • Root cause: improper input validation (CWE-20) within the UniFi Protect Application that fails to properly sanitize attacker-supplied input before it is processed by the host system.
  • Trigger conditions: a malicious actor only needs network access to the UniFi Protect Application; no valid credentials or user interaction are required.
  • Attack vector: remote, over the network (AV:N), with low attack complexity (AC:L) and no privileges required (PR:N).
  • Impact: successful exploitation allows execution of arbitrary operating system commands on the host device, resulting in full compromise of confidentiality, integrity, and availability (scope changed, C:H/I:H/A:H).

Affected software

  • Ubiquiti UniFi Protect Application: all versions prior to 7.2.105

Severity

  • CVSS v3.1 Base Score: 10.0 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade the UniFi Protect Application to version 7.2.105 or later, as published in Ubiquiti’s Security Advisory Bulletin 067.
  • If a patch cannot be applied immediately: restrict network access to the UniFi Protect Application to trusted management networks only, disable exposure of the application to the public internet, and monitor for unexpected outbound connections or process execution on the host device until the update can be applied.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Page title: UniFi Protect

References

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