CVE-2026-54400

Published Jul 2, 2026

Last updated a month ago

CVSS critical 9.1

Overview

Description: A malicious actor with access to the network and high privileges could exploit an Improper Access Control vulnerability found in UniFi Access Application to escalate privileges on the host device.
Source: support@hackerone.com
NVD status: Analyzed
Products: unifi_access

Risk scores

CVSS 3.1

Type: Secondary
Base score: 9.1
Impact score: 6
Exploitability score: 2.3
Vector string: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Severity: CRITICAL

Weaknesses

support@hackerone.com: CWE-284

Hype score: Not currently trending

🚨Critical - Ubiquiti UniFi: Command Injection in UniFi OS + Privilege Escalation in UniFi Access (CVE-2026-54402, CVE-2026-54400) Ubiquiti's SA Bulletin 066 covers two critical flaws. CVE-2026-54402 is an improper input validation issue in UniFi OS that leads to command
@UpwindMDR
3 Jul 2026
102 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:ui:unifi_access:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "CED8C93F-E70F-419F-ADA4-972BAFAF52AD",
            "versionEndExcluding": "4.2.29",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References