CVE-2026-33788
Received Received - Intake
Missing Authentication in Juniper Junos PTX FPCs Enables Privilege Escalation

Publication date: 2026-04-09

Last updated on: 2026-04-09

Assigner: Juniper Networks, Inc.

Description
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.
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Meta Information
Published
2026-04-09
Last Modified
2026-04-09
Generated
2026-06-16
AI Q&A
2026-04-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-33788
EUVD
EUVD-2026-21093
Affected Vendors & Products
Showing 6 associated CPEs
Vendor Product Version / Range
juniper_networks junos_os_evolved to 21.2R3-S8-EVO (exc)
juniper_networks junos_os_evolved to 21.4R3-S7-EVO (exc)
juniper_networks junos_os_evolved to 22.2R3-S4-EVO (exc)
juniper_networks junos_os_evolved to 22.3R3-S3-EVO (exc)
juniper_networks junos_os_evolved to 22.4R3-S2-EVO (exc)
juniper_networks junos_os_evolved to 23.2R2-EVO (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
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Executive Summary

This vulnerability is a Missing Authentication for Critical Function issue in the Flexible PIC Concentrators (FPCs) of Juniper Networks Junos OS Evolved on PTX Series devices.

It allows a local, authenticated attacker with low privileges to gain direct access to the installed FPCs as a high privileged user.

Essentially, a user with limited access rights can escalate their privileges and control critical components of the device without proper authentication.

Impact Analysis

The vulnerability can lead to a full compromise of the affected component, as a low privileged local user can gain high privileged access to the Flexible PIC Concentrators.

This means that an attacker could potentially control critical hardware components of the device, which could impact the device's operation, security, and the network it supports.

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