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CVE-2026-57028 Juniper Networks CVE debrief

CVE-2026-57028 is an Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved. This issue allows an unauthenticated, network-based attacker to cause license exhaustion due to incorrect initialization of a process. The process, which should only communicate internally, can be reached over the network via an open port, leading to unauthorized access to license management. This affects all Junos OS Evolved versions before 23.2R2-EVO.

Vendor
Juniper Networks
Product
Junos OS Evolved
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-09
Original CVE updated
2026-07-13
Advisory published
2026-07-09
Advisory updated
2026-07-13

Who should care

Users of Juniper Networks Junos OS Evolved, especially those who have not upgraded to version 23.2R2-EVO or later, should be aware of this vulnerability. An unauthenticated attacker could exploit this issue to cause license exhaustion, which may impact network operations.

Technical summary

The vulnerability is caused by the incorrect initialization of a process in Juniper Networks Junos OS Evolved. This process, intended for internal communication only, can be accessed over the network through an open port. Consequently, an unauthenticated, network-based attacker can reach the license management, potentially leading to license exhaustion. The issue affects all versions of Junos OS Evolved prior to 23.2R2-EVO. The CVSS score for this vulnerability is 6.9, indicating a medium severity level.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, especially in environments where Juniper Networks Junos OS Evolved is used and license management is critical.

Recommended defensive actions

  • Inventory and assess the use of Juniper Networks Junos OS Evolved in your environment.
  • Check if the current version of Junos OS Evolved is prior to 23.2R2-EVO.
  • Apply the necessary patches or upgrades to Junos OS Evolved to version 23.2R2-EVO or later.
  • Monitor license usage and be prepared to respond to potential license exhaustion attempts.
  • Consider implementing compensating controls to limit access to license management functions.

Evidence notes

The CVE record was published on 2026-07-09T22:17:08.257Z and was last modified on 2026-07-10T15:16:45.303Z. The NVD entry is currently Received. Evidence is based on the official CVE record and NVD details. Limited source detail exists; further verification is recommended.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-57028 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-57028

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-57028 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-57028

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.