CVE-2021-0253

HIGH

Juniper Networks Junos OS - Privilege Escalation

Title source: llm
STIX 2.1

Description

NFX Series devices using Juniper Networks Junos OS are susceptible to a local command execution vulnerability thereby allowing an attacker to elevate their privileges via the Junos Device Management Daemon (JDMD) process. This issue affects Juniper Networks Junos OS on NFX Series 17.2 version 17.2R1 and later versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R2-S5, 18.4R3-S5; 19.1 versions prior to 19.1R1-S3; 19.2 version 19.1R2 and later versions prior to 19.2R3; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R2-S2. 19.4 versions 19.4R3 and above. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1. This issue does not affect the JDMD as used by Junos Node Slicing such as External Servers use in conjunction with Junos Node Slicing and In-Chassis Junos Node Slicing on MX480, MX960, MX2008, MX2010, MX2020.

References (2)

Core 2
Core References
Vendor Advisory x_refsource_misc
https://kb.juniper.net/JSA11146

Scores

CVSS v3 7.8
EPSS 0.0044
EPSS Percentile 63.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-77
Status published
Products (3)
juniper/junos 17.2 r1 (19 CPE variants)
juniper/junos 17.3 (23 CPE variants)
juniper/junos 17.4 (8 CPE variants)
Published Apr 22, 2021
Tracked Since Feb 18, 2026