What is CVE-2026-22559?

CVE-2026-22559 is a high-severity vulnerability in Ubiquiti Inc Unifi Network Server, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-03-24.

How severe is CVE-2026-22559?

High severity. CVSS v3 base score is 8.8 out of 10.

Improper input validation in Ubiquiti Inc Unifi Network Server

CVE-2026-22559

An Improper Input Validation vulnerability in UniFi Network Server may allow unauthorized access to an account if the account owner is socially engineered into clicking a malicious link. Affected Products: UniFi Network Server (Versi…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.000 (10.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ubiquiti Inc Unifi Network Server — versions 10.1.89

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support@hackerone.com

Frequently asked questions

What is CVE-2026-22559?: CVE-2026-22559 is a high-severity vulnerability in Ubiquiti Inc Unifi Network Server, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-03-24.
How severe is CVE-2026-22559?: High severity. CVSS v3 base score is 8.8 out of 10.