What is CVE-2019-5426?

CVE-2019-5426 is a medium-severity vulnerability in Ubiquiti Networks Edgemax, classified under Improper Authentication. CVSS score: 4.8/10. Published 2019-04-10.

How severe is CVE-2019-5426?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Auth bypass in Ubiquiti Networks Edgemax

CVE-2019-5426

In Ubiquiti Networks EdgeSwitch X v1.1.0 and prior, an unauthenticated user can use the "local port forwarding" and "dynamic port forwarding" (SOCKS proxy) functionalities. Remote attackers without credentials can exploit this bug to access local services or forward traffic through the device if SSH is enabled in the system settings.

Vulnerability class: Broken Authentication

Published 2019-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.4th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Ubiquiti Networks Edgemax — versions EdgeSwitch X prior to v1.1.1
Ui Edgeswitch X

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

hackerone.com/reports/512958 (Third Party Advisory)
community.ubnt.com/t5/EdgeMAX-Updates-Blog/EdgeMAX-EdgeSwitch-X-software-releas… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-5426?: CVE-2019-5426 is a medium-severity vulnerability in Ubiquiti Networks Edgemax, classified under Improper Authentication. CVSS score: 4.8/10. Published 2019-04-10.
How severe is CVE-2019-5426?: Medium severity. CVSS v3 base score is 4.8 out of 10.