CVE-2026-102013 Juniper Networks CVE debrief

Who should care

Network administrators and security teams responsible for Junos OS and Junos OS Evolved systems, particularly those with exposure to the chassis-internal network.

Why it matters

CVE-2026-102013 is a medium-severity vulnerability in Junos OS and Junos OS Evolved that can cause a denial of service. Network administrators and security teams should review and update access controls, implement network segmentation, and monitor system logs to mitigate potential impacts.

• Denial of service via na-grpcd process crashes
• Potential for network instability or downtime
• Need for verification of system configurations and access controls
• Possible impact on network segmentation and isolation strategies

Technical summary

A NULL Pointer Dereference vulnerability in the na-grpcd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated attacker with access to the chassis-internal network to cause a denial of service via a network message. The vulnerability affects multiple versions of Junos OS and Junos OS Evolved.

Defensive priority

Medium priority for Junos OS and Junos OS Evolved systems, focusing on network segmentation and access control.

Recommended defensive actions

• Review and update access controls for the chassis-internal network
• Implement network segmentation to limit attacker movement
• Monitor system logs for na-grpcd process crashes
• Verify system configurations against vendor recommendations

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on potential exploits or impacts. The official CVE Program record and NIST NVD detail page offer additional information. However, further verification is needed to determine the full scope of affected systems and potential mitigations. Defenders should verify system configurations against vendor recommendations and review access controls for the chassis-internal network.

Sources and 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.