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Critical

Command Injection in Ubiquiti UniFi OS

IdentifiersCVE-2026-47370CWE-20· Improper Input Validation

CVE-2026-47370 is an improper input validation vulnerability affecting certain devices running Ubiquiti UniFi OS. According to the provided content, a malicious actor with network access and low privileges can exploit the flaw to achieve command injection on the affected UniFi OS device or instance. The available context also indicates that similar validation failures exist within UniFi OS infrastructure and that this issue is associated with internal privilege escalation risk.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can allow an attacker with low privileges to execute injected commands on the affected UniFi OS device or instance. The provided CVSS v3.1 vector (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H) indicates high impact to confidentiality, integrity, and availability. The supporting context further states that attackers may escalate internal system privileges and potentially hijack the host device completely.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by restricting network access to UniFi OS management interfaces and services to trusted administrative networks only, minimizing the number of low-privileged accounts, and monitoring for suspicious command execution or privilege escalation activity. The primary mitigation in the provided content is to update affected systems per Ubiquiti’s advisory.

Remediation

Patch, then assume compromise.

Apply the vendor-provided fixes referenced in Ubiquiti Security Advisory Bulletin 065. The provided content states that administrators should update UniFi OS Server to version 5.1.15 and follow Ubiquiti’s official advisory for detailed update guidance and affected-version specifics.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

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Exposure mapping

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Threat actor evidence

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Associated malware

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Detection signatures

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Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity5

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