What is CVE-2019-25652?

CVE-2019-25652 is a high-severity vulnerability in Ubiquiti Unifi Network Controller, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2026-03-27.

How severe is CVE-2019-25652?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Ubiquiti Unifi Network Controller

CVE-2019-25652

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 cer…

Vulnerability class: Improper Certificate Validation

EPSS: 0.000 (3.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ubiquiti Unifi Network Controller — versions 5.6.43, 5.6.42, 0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

community.ui.com/releases/Security-Advisory-Bulletin-003-003/982bbaa8-2a07-4f81… (vendor-advisory)
www.vulncheck.com/advisories/unifi-network-controller-improper-certificate-vali… (third-party-advisory)

Frequently asked questions

What is CVE-2019-25652?: CVE-2019-25652 is a high-severity vulnerability in Ubiquiti Unifi Network Controller, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2026-03-27.
How severe is CVE-2019-25652?: High severity. CVSS v3 base score is 7.5 out of 10.