Junos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs (CVE-2026-33788) | HOL Guard CVE

High · CVSS 7.8CVE-2026-33788

Junos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs

Answer in brief

CVE-2026-33788 records a High severity (CVSS 7.8) vulnerability in Junos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs. The current sources do not mark it as known exploited. The current feed maps Juniper Networks/Junos OS Evolved (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Apr 9, 2026Updated Jul 8, 2026Source checked Sep 19, 2026First seen by HOL Jul 8, 2026Material review Jul 8, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Juniper Networks/Junos OS Evolved (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Juniper Networks/Junos OS Evolvedgeneric	>=0 <21.2R3-S8-EVO \|\| >=21.4-EVO <21.4R3-S7-EVO \|\| >=22.2-EVO <22.2R3-S4-EVO \|\| >=22.3-EVO <22.3R3-S3-EVO \|\| >=22.4-EVO <22.4R3-S2-EVO \|\| >=23.2-EVO <23.2R2-EVO	21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S2-EVO, 23.2R2-EVO

Recommended response

Check inventory. Check lockfiles and deployed manifests for Juniper Networks/Junos OS Evolved.
Review the reported fix. Update Juniper Networks/Junos OS Evolved to 21.2R3-S8-EVO if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Apr 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 8, 2026

Sources and claim methodology

Source referencekb.juniper.net

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.