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CVE PROGRAM SOURCE RECORD7.0 High

CVE-2026-21916

Junos OS: A low privileged user can escalate their privileges so that they can login as root

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Status
Published
Published
Updated
Assigning organization
juniper

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Juniper Networks Junos OS

Default version status: unaffected

  • 0 to < 23.2R2-S7affected
  • 23.4 to < 23.4R2-S6affected
  • 24.2 to < 24.2R2-S3affected
  • 24.4 to < 24.4R2-S2affected
  • 25.2 to < 25.2R2affected
  • 25.4R1unaffected

References