CVE-2026-33788

Analyzed Analyzed - Analysis Complete

Missing Authentication in Juniper Junos PTX FPCs Enables Privilege Escalation

Publication date: 2026-04-09

Last updated on: 2026-07-22

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-09

Last Modified

2026-07-22

Generated

2026-07-26

AI Q&A

2026-04-10

EPSS Evaluated

2026-07-25

NVD

CVE-2026-33788

EUVD

EUVD-2026-21093

Affected Vendors & Products

Vendor	Product	Version / Range
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	to 21.2 (exc)
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	23.2
juniper	junos_os_evolved	23.2
juniper	junos_os_evolved	23.2
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	23.2
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	22.3
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.2
juniper	junos_os_evolved	21.4
juniper	junos_os_evolved	21.4

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

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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