CVE-2019-25651 Ubiquiti UniFi Devices Use of AES-CBC Allows Key Recovery and Unauthorized Device Control
Attackers with adjacent network access can recover encryption keys from captured traffic due to weak AES-CBC usage, enabling unauthorized control of Ubiquiti UniFi network devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-25651?
CVE-2019-25651 is a critical vulnerability in Ubiquiti UniFi Network Controller, published on 27 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-327
Which versions are affected by CVE-2019-25651?
How do I fix CVE-2019-25651?
No fix has been published for CVE-2019-25651 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-25651 being exploited?
There is no known exploitation of CVE-2019-25651 in the wild and no public exploit code.
Sources
Also known as GHSA-m2rv-r87h-2v59.