What is CVE-2021-44530?

CVE-2021-44530 is a critical-severity vulnerability in Ui Unifi Network Controller, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2022-01-14.

How severe is CVE-2021-44530?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Ui Unifi Network Controller

CVE-2021-44530

An injection vulnerability exists in a third-party library used in UniFi Network Version 6.5.53 and earlier (Log4J CVE-2021-44228) allows a malicious actor to control the application.

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

Published 2022-01-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Ui Unifi Network Controller
Unifi Network Application — versions Fixed in 6.5.54 and later.

Weakness classification (CWE)

References

community.ui.com/releases/Security-Advisory-Bulletin-023-023/808a1db0-5f8e-4b91… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-44530?: CVE-2021-44530 is a critical-severity vulnerability in Ui Unifi Network Controller, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2022-01-14.
How severe is CVE-2021-44530?: Critical severity. CVSS v3 base score is 9.8 out of 10.