CVE-2026-33788

Summary

A Missing Authentication for Critical Function vulnerability in the Flexible PIC Concentrators (FPCs) of Juniper Networks Junos OS Evolved on PTX Series allows a local, authenticated attacker with low privileges to gain direct access to FPCs installed in the device.

A local user with low privileges can gain direct access to the installed FPCs as a high privileged user, which can potentially lead to a full compromise of the affected component.

This issue affects Junos OS Evolved on PTX10004, PTX10008, PTX100016, with JNP10K-LC1201 or JNP10K-LC1202:

  • All versions before 21.2R3-S8-EVO,
  • 21.4-EVO versions before 21.4R3-S7-EVO,
  • 22.2-EVO versions before 22.2R3-S4-EVO,
  • 22.3-EVO versions before 22.3R3-S3-EVO,
  • 22.4-EVO versions before 22.4R3-S2-EVO,
  • 23.2-EVO versions before 23.2R2-EVO.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS Evolved0 < 21.2R3-S8-EVOaffected
Juniper NetworksJunos OS Evolved21.4-EVO < 21.4R3-S7-EVOaffected
Juniper NetworksJunos OS Evolved22.2-EVO < 22.2R3-S4-EVOaffected
Juniper NetworksJunos OS Evolved22.3-EVO < 22.3R3-S3-EVOaffected
Juniper NetworksJunos OS Evolved22.4-EVO < 22.4R3-S2-EVOaffected
Juniper NetworksJunos OS Evolved23.2-EVO < 23.2R2-EVOaffected

Weaknesses

  • CWE-306: CWE-306 Missing Authentication for Critical Function

Workarounds

Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References