CVE-2026-33803: CWE-923 Improper Restriction of Communication Channel to Intended Endpoints in Juniper Networks Junos OS Evolved
CVE-2026-33803 is a vulnerability in Juniper Networks Junos OS Evolved where a process intended for internal communication is exposed over the network due to improper initialization. This allows an unauthenticated attacker to cause limited information disclosure and impact device availability by increasing CPU usage. The issue affects multiple versions of Junos OS Evolved prior to specific fixed releases.
AI Analysis
Technical Summary
This vulnerability (CWE-923) in Junos OS Evolved arises from improper restriction of communication channels to intended endpoints. A process that should only communicate internally is reachable externally via an open network port, exposing the device inadvertently. This exposure can lead to limited information disclosure and increased CPU consumption due to processing unexpected ingress packets. The affected versions include all versions before 23.2R2-S7-EVO, 23.4 versions before 23.4R2-S8-EVO, 24.2 versions before 24.2R2-S5-EVO, 24.4 versions before 24.4R2-S4-EVO, 25.2 versions before 25.2R2-S1-EVO, and 25.4 versions before 25.4R1-S2-EVO.
Potential Impact
An unauthenticated, network-based attacker can exploit this vulnerability to cause limited information disclosure and degrade device availability by increasing CPU load. The exposure of an internal-only communication process over the network increases the attack surface and resource consumption on the affected device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is indicated in the provided data. Users should monitor Juniper Networks advisories for updates and apply patches once available.
CVE-2026-33803: CWE-923 Improper Restriction of Communication Channel to Intended Endpoints in Juniper Networks Junos OS Evolved
Description
CVE-2026-33803 is a vulnerability in Juniper Networks Junos OS Evolved where a process intended for internal communication is exposed over the network due to improper initialization. This allows an unauthenticated attacker to cause limited information disclosure and impact device availability by increasing CPU usage. The issue affects multiple versions of Junos OS Evolved prior to specific fixed releases.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-923) in Junos OS Evolved arises from improper restriction of communication channels to intended endpoints. A process that should only communicate internally is reachable externally via an open network port, exposing the device inadvertently. This exposure can lead to limited information disclosure and increased CPU consumption due to processing unexpected ingress packets. The affected versions include all versions before 23.2R2-S7-EVO, 23.4 versions before 23.4R2-S8-EVO, 24.2 versions before 24.2R2-S5-EVO, 24.4 versions before 24.4R2-S4-EVO, 25.2 versions before 25.2R2-S1-EVO, and 25.4 versions before 25.4R1-S2-EVO.
Potential Impact
An unauthenticated, network-based attacker can exploit this vulnerability to cause limited information disclosure and degrade device availability by increasing CPU load. The exposure of an internal-only communication process over the network increases the attack surface and resource consumption on the affected device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is indicated in the provided data. Users should monitor Juniper Networks advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-03-23T19:46:13.674Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a50171468715ace431ea185
Added to database: 07/09/2026, 21:48:04 UTC
Last enriched: 07/09/2026, 22:05:29 UTC
Last updated: 07/10/2026, 01:36:39 UTC
Views: 7
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