CVE-2021-0231: Juniper Junos

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

A path traversal vulnerability in the Juniper Networks SRX and vSRX Series may allow an authenticated J-web user to read sensitive system files. This issue affects Juniper Networks Junos OS on SRX and vSRX Series: 19.3 versions prior to 19.3R2-S6, 19.3R3-S1; 19.4 versions prior to 19.4R2-S4, 19.4R3; 20.1 versions prior to 20.1R1-S4, 20.1R2; 20.2 versions prior to 20.2R1-S3, 20.2R2; This issue does not affect Juniper Networks Junos OS versions prior to 19.3R1.

Affected products

• Juniper Junos: version 19.3 only; version 19.4 only; version 20.1 only; version 20.2 only

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