Ubiquiti UniFi Network Controller up to 5.6.41/5.10.21/5.11.17 certificate validation

Summaryinfo

A vulnerability has been found in Ubiquiti UniFi Network Controller up to 5.6.41/5.10.21/5.11.17 and classified as critical. This affects an unknown function. Performing a manipulation results in certificate validation. This vulnerability is identified as CVE-2019-25652. The attack can only be performed from the local network. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Ubiquiti UniFi Network Controller up to 5.6.41/5.10.21/5.11.17. It has been classified as critical. This affects an unknown part. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

UniFi Network Controller before version 5.10.22 and 5.11.x before 5.11.18 contains an improper certificate verification vulnerability that allows adjacent network attackers to conduct man-in-the-middle attacks by presenting a false SSL certificate during SMTP connections. Attackers can intercept SMTP traffic and obtain credentials by exploiting the insecure SSL host verification mechanism in the SMTP certificate validation process.

The advisory is shared at community.ui.com. This vulnerability is uniquely identified as CVE-2019-25652 since 03/26/2026. The exploitability is told to be difficult. The attack needs to be done within the local network. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1587.003 for this issue.

Upgrading to version 5.6.42, 5.10.22 or 5.11.18 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-2019-20043). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Ubiquiti

Name

• UniFi Network Controller

Version

• 5.6.0
• 5.6.1
• 5.6.2
• 5.6.3
• 5.6.4
• 5.6.5
• 5.6.6
• 5.6.7
• 5.6.8
• 5.6.9
• 5.6.10
• 5.6.11
• 5.6.12
• 5.6.13
• 5.6.14
• 5.6.15
• 5.6.16
• 5.6.17
• 5.6.18
• 5.6.19
• 5.6.20
• 5.6.21
• 5.6.22
• 5.6.23
• 5.6.24
• 5.6.25
• 5.6.26
• 5.6.27
• 5.6.28
• 5.6.29
• 5.6.30
• 5.6.31
• 5.6.32
• 5.6.33
• 5.6.34
• 5.6.35
• 5.6.36
• 5.6.37
• 5.6.38
• 5.6.39
• 5.6.40
• 5.6.41
• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5
• 5.10.6
• 5.10.7
• 5.10.8
• 5.10.9
• 5.10.10
• 5.10.11
• 5.10.12
• 5.10.13
• 5.10.14
• 5.10.15
• 5.10.16
• 5.10.17
• 5.10.18
• 5.10.19
• 5.10.20
• 5.10.21
• 5.11.0
• 5.11.1
• 5.11.2
• 5.11.3
• 5.11.4
• 5.11.5
• 5.11.6
• 5.11.7
• 5.11.8
• 5.11.9
• 5.11.10
• 5.11.11
• 5.11.12
• 5.11.13
• 5.11.14
• 5.11.15
• 5.11.16
• 5.11.17

License

• commercial

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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