Juniper Junos OS Evolved prior 25.4R1-S2-EVO Intended Endpoint information disclosure

Summaryinfo

A vulnerability categorized as problematic has been discovered in Juniper Junos OS Evolved. Affected by this vulnerability is an unknown functionality of the component Intended Endpoint. The manipulation results in information disclosure. This vulnerability is reported as CVE-2026-33803. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Juniper Junos OS Evolved. It has been classified as problematic. Affected is an unknown functionality of the component Intended Endpoint. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device. Due to a wrong initialization, a process which should only be able to communicate internally within the device can be reached over the network via an open port. This leads to a device being inadvertently exposed and increased CPU cycles spent processing ingress packets. This issue affects Junos OS Evolved: * 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, * 25.4 versions before 25.4R1-S2-EVO.

The advisory is available at supportportal.juniper.net. This vulnerability is traded as CVE-2026-33803 since 03/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/09/2026). This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 23.2R2-S7-EVO, 23.4R2-S8-EVO, 24.2R2-S5-EVO, 24.4R2-S4-EVO, 25.2R2-S1-EVO or 25.4R1-S2-EVO eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS Evolved

License

• commercial

Website

• Vendor: https://www.juniper.net/

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CPE 2.2info

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