{"id":"CVE-2019-25651","state":"PUBLISHED","title":"Ubiquiti UniFi Devices Use of AES-CBC Allows Key Recovery and Unauthorized Device Control","description":"Ubiquiti UniFi Network Controller prior to 5.10.12 (excluding 5.6.42), UAP FW prior to 4.0.6, UAP-AC, UAP-AC v2, and UAP-AC Outdoor FW prior to 3.8.17, USW FW prior to 4.0.6, USG FW prior to 4.4.34 uses AES-CBC encryption for device-to-controller communication, which contains cryptographic weaknesses that allow attackers to recover encryption keys from captured traffic. Attackers with adjacent network access can capture sufficient encrypted traffic and exploit AES-CBC mode vulnerabilities to derive the encryption keys, enabling unauthorized control and management of network devices.","publishedAt":"2026-03-27T21:16:30.611Z","updatedAt":"2026-07-15T01:24:05.621Z","severity":{"score":9,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","source":"VulnCheck"},"assigner":"VulnCheck","products":["Ubiquiti UniFi Network Controller","Ubiquiti UniFi UAP Firmware","Ubiquiti UniFi UAP-AC Firmware","Ubiquiti UniFi USW Firmware","Ubiquiti UniFi USG Firmware"],"affected":[{"vendor":"Ubiquiti","product":"UniFi Network Controller","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.6.42","versionType":"semver"},{"version":"5.6.43","status":"affected","lessThan":"5.10.12","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi UAP Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.0.6","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi UAP-AC Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.8.17","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi USW Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.0.6","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi USG Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.4.34","versionType":"semver"}]}],"references":["https://community.ui.com/releases/Security-Advisory-Bulletin-004-004/462e561b-9efd-4c23-bfa7-53d59cc64ecb","https://www.vulncheck.com/advisories/ubiquiti-unifi-devices-use-of-aes-cbc-allows-key-recovery-and-unauthorized-device-control"],"weaknesses":["CWE-327"],"ingestedAt":"2026-10-29T19:45:53.332Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/25xxx/CVE-2019-25651.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2019-25651","state":"PUBLISHED","datePublished":"2026-03-27T21:16:30.611Z","dateUpdated":"2026-07-15T01:24:05.621Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-03-26T20:24:49.635Z"},"containers":{"cna":{"title":"Ubiquiti UniFi Devices Use of AES-CBC Allows Key Recovery and Unauthorized Device Control","descriptions":[{"lang":"en","value":"Ubiquiti UniFi Network Controller prior to 5.10.12 (excluding 5.6.42), UAP FW prior to 4.0.6, UAP-AC, UAP-AC v2, and UAP-AC Outdoor FW prior to 3.8.17, USW FW prior to 4.0.6, USG FW prior to 4.4.34 uses AES-CBC encryption for device-to-controller communication, which contains cryptographic weaknesses that allow attackers to recover encryption keys from captured traffic. Attackers with adjacent network access can capture sufficient encrypted traffic and exploit AES-CBC mode vulnerabilities to derive the encryption keys, enabling unauthorized control and management of network devices."}],"affected":[{"vendor":"Ubiquiti","product":"UniFi Network Controller","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.6.42","versionType":"semver"},{"version":"5.6.43","status":"affected","lessThan":"5.10.12","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi UAP Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.0.6","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi UAP-AC Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.8.17","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi USW Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.0.6","versionType":"semver"}]},{"vendor":"Ubiquiti","product":"UniFi USG Firmware","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.4.34","versionType":"semver"}]}],"references":[{"url":"https://community.ui.com/releases/Security-Advisory-Bulletin-004-004/462e561b-9efd-4c23-bfa7-53d59cc64ecb","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/ubiquiti-unifi-devices-use-of-aes-cbc-allows-key-recovery-and-unauthorized-device-control","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"HIGH","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9,"vectorString":"CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"ADJACENT_NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","version":"3.1","baseSeverity":"HIGH","baseScore":8.3,"vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-327","lang":"en","description":"CWE-327 Use of a Broken or Risky Cryptographic Algorithm","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-07-15T01:24:05.621Z"},"datePublic":"2019-05-15T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:ui:unifi_network_controller:*:*:*:*:*:*:*:*","versionEndExcluding":"5.6.42"},{"vulnerable":true,"criteria":"cpe:2.3:a:ui:unifi_network_controller:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6.43","versionEndExcluding":"5.10.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:ui:unifi_uap_firmware:*:*:*:*:*:*:*:*","versionEndExcluding":"4.0.6"}]}]}],"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-30T17:51:04.700943Z","id":"CVE-2019-25651","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-30T17:55:00.222Z"}}]}}}