CVE-2026-33788

Local privilege escalation through unauthenticated FPC access

Published Apr 9, 2026 · Updated Apr 9, 2026

Missing authentication in Junos OS Evolved FPC access allows local users with low privileges to gain high-privileged FPC access. The public Juniper record identifies the Flexible PIC Concentrator access path but does not disclose the command, service, or failed authentication operation. The flaw is limited to specified PTX10004, PTX10008, and PTX10016 systems with JNP10K-LC1201 or JNP10K-LC1202 cards, where it permits full compromise of the affected FPC.

CVSS severity8.5
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Junos OS Evolved FPC access allows local users with low privileges to gain high-privileged FPC access. The public Juniper record identifies the Flexible PIC Concentrator access path but does not disclose the command, service, or failed authentication operation. The flaw is limited to specified PTX10004, PTX10008, and PTX10016 systems with JNP10K-LC1201 or JNP10K-LC1202 cards, where it permits full compromise of the affected FPC.

The record

CVE
CVE-2026-33788
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-306, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <21.2R3-S8-EVO
  2. Affected versionversion=21.4-EVO <21.4R3-S7-EVO
  3. Affected versionversion=22.2-EVO <22.2R3-S4-EVO
  4. Affected versionversion=22.3-EVO <22.3R3-S3-EVO
  5. Affected versionversion=22.4-EVO <22.4R3-S2-EVO
  6. Affected versionversion=23.2-EVO <23.2R2-EVO

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.2R3-S8-EVO; version=21.4-EVO <21.4R3-S7-EVO; version=22.2-EVO <22.2R3-S4-EVO; version=22.3-EVO <22.3R3-S3-EVO; version=22.4-EVO <22.4R3-S2-EVO; version=23.2-EVO <23.2R2-EVO

Published CVSS scores

7.8Juniper NetworksCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5Juniper NetworksCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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