High [CVE-2026-33788] 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
This high-severity Juniper Networks advisory covers CVE-2026-33788 affecting Junos OS Evolved, Junos OS, Junos.
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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,
- * All versions before 21
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 21.2R3-S8-EVO
- 21.4R3-S7-EVO
- 22.2R3-S4-EVO
- 22.3R3-S3-EVO
- 22.4R3-S2-EVO
- 23.2R2-EVO
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S2-EVO, 23.2R2-EVO. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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