VDB-354035 · CVE-2019-25651 · EUVD-2019-20041

Ubiquiti UniFi Network Controller prior 5.6.42/5.10.12 risky encryption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.6	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Ubiquiti UniFi Network Controller, UniFi UAP, UniFi UAP-AC, UniFi USW and UniFi USG and classified as problematic. Affected by this vulnerability is an unknown functionality. The manipulation leads to risky encryption. This vulnerability is referenced as CVE-2019-25651. The attack needs to be initiated within the local network. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Ubiquiti UniFi Network Controller, UniFi UAP, UniFi UAP-AC, UniFi USW and UniFi USG. This issue affects an unknown part. The manipulation with an unknown input leads to a risky encryption vulnerability. Using CWE to declare the problem leads to CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. Impacted is confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at community.ui.com. The identification of this vulnerability is CVE-2019-25651 since 03/26/2026. The exploitation is known to be difficult. The attack needs to be done within the local network. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

Upgrading to version 5.6.42 or 5.10.12 eliminates this vulnerability. The upgrade is hosted for download at community.ui.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2019-20041). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Ubiquiti

Name

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Risky encryption
CWE: CWE-327 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: UniFi Network Controller/UniFi UAP/UniFi UAP-AC/UniFi USW/UniFi USG 5.6.42/5.10.12

Timelineinfo

03/26/2026 CVE reserved
03/27/2026 +1 days Advisory disclosed
03/27/2026 +0 days VulDB entry created
03/28/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: community.ui.com
Status: Confirmed

CNA: VulnCheck
CVE: CVE-2019-25651 (🔒)

GCVE (CVE): GCVE-0-2019-25651
GCVE (VulDB): GCVE-100-354035
EUVD: 🔒

Entryinfo

Created: 03/27/2026 23:45
Updated: 03/28/2026 04:36
Changes: 03/27/2026 23:45 (75), 03/28/2026 04:36 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.