CVE-2026-57028 Juniper Networks CVE debrief

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.

Official resources