CVE-2026-77536 (GCVE-0-2026-77536)

Vulnerability from cvelistv5 – Published: 2026-08-26 09:35 – Updated: 2026-08-27 03:56
VLAI
Summary
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.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 00:00 UTC
CWE
  • CWE-284 - Improper Access Control - Generic
Assigner
References
Impacted products
Vendor Product Version CPE status
Ubiquiti Inc UniFi OS Server Affected: 0 , < 5.1.37 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Cloud Keys Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Network Video Recorders Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Enterprise Network Video Recorders Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Enterprise Network Attached Storage Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Dream Machines Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Enterprise Firewall Core Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Dream Routers Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Enterprise Fortress Gateway Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Cloud Gateways Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Dream Wall Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Express 7 Affected: 0 , < 5.1.31 (semver)
guessed Create a notification for this product.
Ubiquiti Inc Network Attached Storage Affected: 0 , < 5.1.32 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-77536",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-26T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-27T03:56:45.782Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "UniFi OS Server",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.37",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Cloud Keys",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Network Video Recorders",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Enterprise Network Video Recorders",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Enterprise Network Attached Storage",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Dream Machines",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Enterprise Firewall Core",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Dream Routers",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Enterprise Fortress Gateway",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Cloud Gateways",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Dream Wall",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Express 7",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.31",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Network Attached Storage",
          "vendor": "Ubiquiti Inc",
          "versions": [
            {
              "lessThan": "5.1.32",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "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."
            }
          ],
          "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-284",
              "description": "CWE-284 Improper Access Control - Generic",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-26T09:35:38.688Z",
        "orgId": "fe490ce8-0395-4072-90d8-2707e1bdf984",
        "shortName": "Ubiquiti"
      },
      "references": [
        {
          "url": "https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "fe490ce8-0395-4072-90d8-2707e1bdf984",
    "assignerShortName": "Ubiquiti",
    "cveId": "CVE-2026-77536",
    "datePublished": "2026-08-26T09:35:38.688Z",
    "dateReserved": "2026-08-20T20:32:30.112Z",
    "dateUpdated": "2026-08-27T03:56:45.782Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-77536",
      "date": "2026-08-27",
      "epss": "0.00232",
      "percentile": "0.1386"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-77536\",\"sourceIdentifier\":\"fe490ce8-0395-4072-90d8-2707e1bdf984\",\"published\":\"2026-08-26T10:16:41.417\",\"lastModified\":\"2026-08-27T04:16:50.217\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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.\"}],\"affected\":[{\"source\":\"fe490ce8-0395-4072-90d8-2707e1bdf984\",\"affectedData\":[{\"vendor\":\"Ubiquiti Inc\",\"product\":\"UniFi OS Server\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.37\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Cloud Keys\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Network Video Recorders\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Enterprise Network Video Recorders\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Enterprise Network Attached Storage\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Dream Machines\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Enterprise Firewall Core\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Dream Routers\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Enterprise Fortress Gateway\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Cloud Gateways\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Dream Wall\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Express 7\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.31\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Ubiquiti Inc\",\"product\":\"Network Attached Storage\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"5.1.32\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"fe490ce8-0395-4072-90d8-2707e1bdf984\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H\",\"baseScore\":9.9,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.1,\"impactScore\":6.0}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-26T00:00:00+00:00\",\"id\":\"CVE-2026-77536\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"fe490ce8-0395-4072-90d8-2707e1bdf984\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-284\"}]}],\"references\":[{\"url\":\"https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9\",\"source\":\"fe490ce8-0395-4072-90d8-2707e1bdf984\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-77536\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-26T12:56:49.047103Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-26T12:56:52.204Z\"}}], \"cna\": {\"source\": {\"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"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\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Ubiquiti Inc\", \"product\": \"UniFi OS Server\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.37\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Cloud Keys\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.31\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Network Video Recorders\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.31\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Enterprise Network Video Recorders\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.31\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Enterprise Network Attached Storage\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.31\", \"versionType\": \"semver\"}], \"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\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.31\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Dream Routers\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.31\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Enterprise Fortress Gateway\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.31\", \"versionType\": \"semver\"}], \"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\"}], \"references\": [{\"url\": \"https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.5\"}, \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"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.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-284\", \"description\": \"CWE-284 Improper Access Control - Generic\"}]}], \"providerMetadata\": {\"orgId\": \"fe490ce8-0395-4072-90d8-2707e1bdf984\", \"shortName\": \"Ubiquiti\", \"dateUpdated\": \"2026-08-26T09:35:38.688Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-77536\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-27T03:56:45.782Z\", \"dateReserved\": \"2026-08-20T20:32:30.112Z\", \"assignerOrgId\": \"fe490ce8-0395-4072-90d8-2707e1bdf984\", \"datePublished\": \"2026-08-26T09:35:38.688Z\", \"assignerShortName\": \"Ubiquiti\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.