CVE-2026-102065 Juniper Networks CVE debrief

Who should care

Network administrators and security teams responsible for Junos OS and Junos OS Evolved systems should assess exposure and prioritize patching or mitigation. They should also verify affected versions and upgrade if necessary, and monitor networks for unusual activity. The vulnerability can cause potential service disruptions and requires monitoring the network for unusual activity.

Why it matters

CVE-2026-102065 is a high-severity vulnerability in Junos OS and Junos OS Evolved that can cause an rpd crash, potentially disrupting network services. Network administrators and security teams should assess exposure, prioritize patching or mitigation, and monitor networks for unusual activity.

• Potential service disruption due to rpd crash
• Need to verify affected versions and upgrade if necessary
• Requires monitoring network for unusual activity

Technical summary

An Improper Validation of Specified Quantity in Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a remote unauthenticated BGP peer to cause an rpd crash via a malformed BGP-signaled SRv6 service route when SRv6 dynamic tunnels are enabled. The vulnerability can cause potential service disruptions and requires monitoring the network for unusual activity. Network administrators and security teams should assess exposure and prioritize patching or mitigation.

Defensive priority

Network administrators should prioritize patching or mitigating this vulnerability to prevent potential service disruptions.

Recommended defensive actions

• Review and apply patches from Juniper Networks
• Verify affected versions and upgrade if necessary
• Monitor network for unusual activity
• 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
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, affected versions, and references to vendor advisories. The vulnerability is a high-severity issue that can cause an rpd crash, potentially disrupting network services. The source item provides additional context on the vulnerability, including its impact on Junos OS and Junos OS Evolved systems.

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.