CVE-2026-33000

Published May 22, 2026

Last updated a month ago

CVSS critical 9.1

Server

Overview

Description: A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection.
Source: support@hackerone.com
NVD status: Analyzed
Products: unifi_os_server

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-20

Hype score: Not currently trending

Warning: #Ubiquiti has released a security advisory bulletin addressing multiple critical vulnerabilities in #UniFi OS, including CVE-2026-34908, CVE-2026-34909, CVE-2026-34910, CVE-2026-33000. Risks ranges from unauthorised changes to command injection: https://t.co/mwPib2vEpg
@CCBalert
26 May 2026
220 Impressions
1 Retweet
0 Likes
0 Bookmarks
0 Replies
0 Quotes

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:ui:unifi_os_server:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "660F20FA-9862-4FE1-8C27-0AEAEE2F2A69",
            "versionEndExcluding": "5.0.8",
            "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