CVE-2026-102174 Juniper Networks CVE debrief

Who should care

Juniper Networks administrators, security teams, and network operators responsible for Junos OS on SRX Series deployments, especially those with remote-access VPN configurations, should prioritize patching and take immediate action to mitigate the vulnerability. Additionally, IT teams responsible for vulnerability management, network security, and incident response should be aware of the potential risks and take proactive measures to prevent exploitation.

Why it matters

CVE-2026-102174 is a high-severity vulnerability in Juniper Networks Junos OS on SRX Series, allowing authenticated remote code execution or denial of service. Defenders should prioritize patching, restrict VPN access, and monitor for suspicious activity.

• Potential for authenticated remote code execution with root privileges
• Possible denial of service via remote-access VPN authentication and JIMS identity-publishing path
• Need for verification of affected Junos OS versions and patch application
• Potential for increased monitoring and logging to detect suspicious activity

Technical summary

The iked IKE key-management daemon in Juniper Networks Junos OS on the SRX Series is vulnerable to a Stack-based Buffer Overflow. An authenticated remote-access VPN client can exploit this vulnerability to execute code with root privileges or cause denial of service. The vulnerability is due to improper handling of IKE packets, allowing an attacker to overflow the buffer and execute arbitrary code. This vulnerability affects Junos OS on SRX Series deployments, especially those with remote-access VPN configurations, and requires immediate attention from administrators and security teams.

Defensive priority

High priority for Junos OS on SRX Series deployments, especially those with remote-access VPN configurations.

Recommended defensive actions

• Review and apply Juniper Networks security patches for Junos OS on SRX Series
• Restrict access to remote-access VPN configurations
• Monitor for suspicious activity on VPN authentication and JIMS identity-publishing paths
• Verify affected Junos OS versions and apply patches
• Conduct regular security audits to identify potential vulnerabilities
• Implement additional monitoring and logging to detect suspicious activity
• Review and update incident response plans to address potential exploitation

Evidence notes

The CVE record and NVD entry provide initial details on the vulnerability. However, specific versions of Junos OS affected and detailed exploitation scenarios require further verification from official sources.

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.