CVE-2019-25651

Ubiquiti UniFi Devices Use of AES-CBC Allows Key Recovery and Unauthorized Device Control

State
Published
Severity
9.0 Critical
Published
Mar 27, 2026
Updated
Jul 15, 2026
Reserved
Mar 26, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.09.0 CriticalCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HVulnCheck
3.18.3 HighCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HVulnCheck

Weaknesses

  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm

Affected Products

ProductVersions
UniFi Network ControllerUbiquiti
  • before 5.6.42Affected
  • 5.6.43 to before 5.10.12Affected
UniFi UAP FirmwareUbiquiti
  • before 4.0.6Affected
UniFi UAP-AC FirmwareUbiquiti
  • before 3.8.17Affected
UniFi USW FirmwareUbiquiti
  • before 4.0.6Affected
UniFi USG FirmwareUbiquiti
  • before 4.4.34Affected

References

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