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CVE-2026-21916

7.0 high SSVC exploitation: none Analyzed
NVD · CVE.org

A UNIX Symbolic Link (Symlink) Following vulnerability in the CLI of Juniper Networks Junos OS allows a local, authenticated attacker with low privileges to escalate their privileges to root which will lead to a complete compromise of the system. When after a user has performed a specific 'file link ...' CLI operation, another user commits (unrelated configuration changes), the first user can login as root. This issue affects Junos OS: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S6, * 24.2 versions before 24.2R2-S3, * 24.4 versions before 24.4R2-S2, * 25.2 versions before 25.2R2. This issue does not affect versions 25.4R1 or later.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.0 · juniperNVD modified 2026-10-26 21:10

Affected (CPE criteria) 39

  • cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r2-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r2-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r2-s5:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.2:r2-s6:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2-s4:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:23.4:r2-s5:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.2:r2-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:r1-s2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:r1-s3:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:r2:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:24.4:r2-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:25.2:r1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:25.2:r1-s1:*:*:*:*:*:*
  • cpe:2.3:o:juniper:junos:25.2:r1-s2:*:*:*:*:*:*

References 1