{
  "id": "CVE-2026-34908",
  "url": "https://spydr.io/cve/CVE-2026-34908",
  "published": "2026-05-22T02:16:34.240Z",
  "modified": "2026-07-23T16:10:00.137Z",
  "score": 10,
  "severity": "critical",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
  "score_source": "hackerone.com",
  "epss": 0.15207,
  "epss_percentile": 0.96662,
  "exploited": true,
  "kev": {
    "added": "2026-06-23",
    "due": "2026-06-26",
    "action": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
    "ransomware": "Unknown",
    "name": "Ubiquiti UniFi OS Improper Access Control Vulnerability",
    "notes": "https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-34908"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Ubiquiti Inc"
  ],
  "products": [
    "Ubiquiti Inc UniFi OS Server",
    "Ubiquiti Inc UDM",
    "Ubiquiti Inc UDM-Pro",
    "Ubiquiti Inc UDM-SE",
    "Ubiquiti Inc UDM-Pro-Max",
    "Ubiquiti Inc UDM-Beast",
    "Ubiquiti Inc EFG",
    "Ubiquiti Inc UDW",
    "Ubiquiti Inc UDR",
    "Ubiquiti Inc UDR7",
    "Ubiquiti Inc UDR-5G",
    "Ubiquiti Inc Express 7",
    "Ubiquiti Inc UNVR",
    "Ubiquiti Inc UNVR-Pro",
    "Ubiquiti Inc UNVR-Instant",
    "Ubiquiti Inc UNVR-G2",
    "Ubiquiti Inc UNVR-G2-Pro",
    "Ubiquiti Inc ENVR",
    "Ubiquiti Inc ENVR-Core",
    "Ubiquiti Inc UNAS-2"
  ],
  "cwes": [
    "CWE-284"
  ],
  "description": "A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 10,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34908",
      "tags": [
        "US Government Resource"
      ]
    },
    {
      "url": "https://www.pwndefend.com/2026/06/09/cve-2026-34910-exploitation-itw-building-a-botnet-mirai/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34908",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}