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No exploitation reported

CVE-2026-54402

No exploitation reported by the sources we read.

  • Published2026-07-02
  • WeaknessCWE-20 · CWE-77

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-07-0215:17CVE publishedNVD

Versions per branch

NVD
Ui enterprise firewall core firmwareversion to verify
BranchAffectedFixed in
5.1≤ 5.1.18no fix published
Ui enterprise fortress gateway firmwareversion to verify
BranchAffectedFixed in
5.1≤ 5.1.15no fix published
Ui enterprise network video recorder core firmwareversion to verify
BranchAffectedFixed in
5.1≤ 5.1.15no fix published

29 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA12 products

As hackerone, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Ubiquiti Inc UniFi OS Serverother versions: not affected
    Affected
    • < 5.1.19fixed in 5.1.19semver
  • Ubiquiti Inc Dream Machinesother versions: not affected
    Affected
    • < 5.1.19fixed in 5.1.19semver
  • Ubiquiti Inc Enterprise Fortress Gatewayother versions: not affected
    Affected
    • < 5.1.19fixed in 5.1.19semver
  • Ubiquiti Inc Dream Wallother versions: not affected
    Affected
    • < 5.1.19fixed in 5.1.19semver
  • Ubiquiti Inc Dream Routersother versions: not affected
    Affected
    • < 5.1.19fixed in 5.1.19semver
  • Ubiquiti Inc Express 7other versions: not affected
    Affected
    • < 5.1.19fixed in 5.1.19semver

6 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-07-02

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2026-07-02
  • CNACVSS 3.19.9known since 2026-10-23
  • NVDCVSS 3.18.8read 2026-10-23
  • CNAweakness (CWE)CWE-20known since 2026-10-23
  • NVDweakness (CWE)CWE-77read 2026-10-23
  • FIRST EPSSEPSS score1.8 %2026-11-09
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2026-07-02
Last Modified
2026-07-10
NVD status
Analyzed
GitHub Advisory
GHSA-ghgx-h467-6r25

Frequently asked questions

What is CVE-2026-54402?

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 actively exploited?

Active exploitation of CVE-2026-54402 has not been confirmed. Its EPSS score was 1.8% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-54402?

CVE-2026-54402 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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