CVE-2019-25651
HIGHUbiquiti UniFi Devices Use of AES-CBC Allows Key Recovery and Unauthorized Device Control
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
https://community.ui.com/releases/Security-Advisory-Bulletin-004-004/462e561b-9efd-4c23-bfa7-53d59cc64ecb
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/ubiquiti-unifi-devices-use-of-aes-cbc-allows-key-recovery-and-unauthorized-device-control
Scores
CVSS v3
8.3
EPSS
0.0008
EPSS Percentile
0.3%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-327
Status
published
Products (8)
Ubiquiti/UniFi Network Controller
< 5.10.12
Ubiquiti/UniFi Network Controller
< 5.6.42
Ubiquiti/UniFi Network Controller
5.6.42
Ubiquiti/UniFi Network Controller
5.6.43 - 5.10.12
Ubiquiti/UniFi UAP Firmware
< 4.0.6
Ubiquiti/UniFi UAP-AC Firmware
< 3.8.17
Ubiquiti/UniFi USG Firmware
< 4.4.34
Ubiquiti/UniFi USW Firmware
< 4.0.6
Published
Mar 27, 2026
Tracked Since
Mar 29, 2026