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CVE-2026-77536

Estado: AplazadaCrítica (9.9)—

A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector CVSS AV:N/AC:L con PR:L (red, requiere privilegios bajos) y CWE-284 (acceso impropio) indica explotación de servicio remoto (T1210). El texto menciona escalada de privilegios explícitamente, resultando en T1068 como impacto primario; el acceso con privilegios mejorados habilita T1078 (acceso

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-77536",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-77536",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-26T00:00:00+00:00"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "fe490ce8-0395-4072-90d8-2707e1bdf984",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.9,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "fe490ce8-0395-4072-90d8-2707e1bdf984",
      "affectedData": [
        {
          "vendor": "Ubiquiti Inc",
          "product": "UniFi OS Server",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "5.1.37",
              "versionType": "semver"
            }
          ],
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        {
          "vendor": "Ubiquiti Inc",
          "product": "Cloud Keys",
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          ],
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        {
          "vendor": "Ubiquiti Inc",
          "product": "Network Video Recorders",
          "versions": [
            {
              "status": "affected",
              "version": "0",
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              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Enterprise Network Video Recorders",
          "versions": [
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              "version": "0",
              "lessThan": "5.1.31",
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            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Enterprise Network Attached Storage",
          "versions": [
            {
              "status": "affected",
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            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Dream Machines",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "5.1.31",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Enterprise Firewall Core",
          "versions": [
            {
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          ],
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        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Dream Routers",
          "versions": [
            {
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            }
          ],
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        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Enterprise Fortress Gateway",
          "versions": [
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              "version": "0",
              "lessThan": "5.1.31",
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            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Cloud Gateways",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "5.1.31",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Dream Wall",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "5.1.31",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Express 7",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "5.1.31",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Ubiquiti Inc",
          "product": "Network Attached Storage",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "5.1.32",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-08-26T10:16:41.417",
  "references": [
    {
      "url": "https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9",
      "source": "fe490ce8-0395-4072-90d8-2707e1bdf984"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "fe490ce8-0395-4072-90d8-2707e1bdf984",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances."
    }
  ],
  "lastModified": "2026-08-28T18:49:15.340",
  "sourceIdentifier": "fe490ce8-0395-4072-90d8-2707e1bdf984"
}