CVE-2021-0248: Juniper Junos

Critical severity, CVSS 10.0. EPSS: 1% chance of exploitation in the next 30 days.

This issue is not applicable to NFX NextGen Software. On NFX Series devices the use of Hard-coded Credentials in Juniper Networks Junos OS allows an attacker to take over any instance of an NFX deployment. This issue is only exploitable through administrative interfaces. This issue affects: Juniper Networks Junos OS versions prior to 19.1R1 on NFX Series. No other platforms besides NFX Series devices are affected.

Affected products

• Juniper Junos: before 19.1 (fixed in 19.1); version 19.1 only

Published 2021-04-22. Last modified 2026-06-17.