CVE-2026-102175 Juniper Networks CVE debrief

Who should care

Juniper Networks administrators and security teams responsible for Junos OS and Junos OS Evolved systems should assess exposure and prioritize patching or mitigation. These teams must verify system configurations, monitor for suspicious activity, and apply patches or updates from Juniper Networks as available. Additionally, they should review compensating controls for exposed systems, check relevant monitoring and logs, and track exceptions and retest rem

Why it matters

CVE-2026-102175 is a critical vulnerability in Juniper Networks Junos OS and Junos OS Evolved, allowing remote unauthenticated attackers to execute code as root or cause denial of service. Juniper Networks administrators and security teams should assess exposure, prioritize patching or mitigation, and verify system configurations.

• Potential for remote code execution as root
• Denial of service via crafted frames
• Need for verification of system configurations and exposure
• Priority for patching or mitigating vulnerable systems

Technical summary

The sdxd service-deployment daemon in Juniper Networks Junos OS and Junos OS Evolved is vulnerable to a Heap-based Buffer Overflow, allowing remote unauthenticated attackers to execute code as root or cause denial of service. The vulnerability is caused by improper handling of crafted frames received over the service-deployment TCP connection. The CVSS score of 9.3 indicates a critical severity level, emphasizing the need for immediate attention and mitigation. The affected products include Juniper Networks Junos OS and Junos OS Evolved.

Defensive priority

High priority for Juniper Networks Junos OS and Junos OS Evolved systems, focusing on restricting access to the service-deployment TCP connection and verifying system configurations.

Recommended defensive actions

• Restrict access to the service-deployment TCP connection
• Verify system configurations and monitor for suspicious activity
• Apply patches or updates from Juniper Networks as available
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information from Juniper Networks is needed for comprehensive risk assessment. The vulnerability is confirmed to exist in Juniper Networks Junos OS and Junos OS Evolved, specifically affecting the sdxd service-deployment daemon. Evidence from the CVE Program and NVD suggests that the vulnerability can be exploited via crafted frames over the service-deployment TCP connection. However, further verification is required to assess the full scope of the  

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.