Is CVE-2019-25652 actively exploited?

No active exploitation of CVE-2019-25652 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-25652 be exploited remotely?

Partially. CVE-2019-25652 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2019-25652?

CVE-2019-25652 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2019-25652

CWE-295Published: March 27, 2026· Updated: Mar 30, 2026

7.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:0.7th

Official Description

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.

NVD Source

Technical Analysis

CVE-2019-25652 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.5.