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CVE-2026-55110 (GCVE-0-2026-55110)

Vulnerability from cvelistv5 – Published: 2026-07-02 14:49 – Updated: 2026-07-02 15:52
VLAI
Summary
A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 15:41 UTC
CWE
  • CWE-942 - Permissive Cross-domain Policy with Untrusted Domains
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-55110\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-02T15:41:35.927153Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-02T15:41:36.930Z\"}}], \"cna\": {\"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H\"}}], \"affected\": [{\"vendor\": \"Ubiquiti Inc\", \"product\": \"UniFi OS Server\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Dream Machines\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Enterprise Fortress Gateway\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Dream Wall\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Dream Routers\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Express 7\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Cloud Keys\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Network Video Recorders\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Enterprise Video Recorders\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Cloud Gateways\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Network Attached Storage\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Ubiquiti Inc\", \"product\": \"Enterprise Firewall Core\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"5.1.19\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user\u0027s session.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-942\", \"description\": \"CWE-942 Permissive Cross-domain Policy with Untrusted Domains\"}]}], \"providerMetadata\": {\"orgId\": \"36234546-b8fa-4601-9d6f-f4e334aa8ea1\", \"shortName\": \"hackerone\", \"dateUpdated\": \"2026-07-02T14:49:16.794Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-55110\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-02T15:52:20.711Z\", \"dateReserved\": \"2026-06-16T15:00:01.614Z\", \"assignerOrgId\": \"36234546-b8fa-4601-9d6f-f4e334aa8ea1\", \"datePublished\": \"2026-07-02T14:49:16.794Z\", \"assignerShortName\": \"hackerone\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.