CVE-2026-102180 Juniper Networks CVE debrief

Who should care

Defenders responsible for Juniper Networks Junos OS and Junos OS Evolved configurations, particularly those using BGP and telemetry, should assess exposure and prioritize patching or mitigation.

Why it matters

CVE-2026-102180 is a denial of service vulnerability in Juniper Networks Junos OS and Junos OS Evolved, requiring defenders to verify exposure, prioritize patching, and monitor BGP activity.

• Denial of service through rpd crash
• Potential disruption to network operations
• Need for verification of BGP configurations and telemetry settings
• Priority for patching or mitigating affected versions

Technical summary

A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker with access to a configured BGP peering session to cause a denial of service by sending a crafted BGP route attribute, which is processed while a BGP RIB streaming telemetry subscription is active. The issue affects Junos OS and Junos OS Evolved versions prior to 22.1R1. Defenders should focus on verifying exposure and applying patches or mitigations, prioritizing BGP configurations and telemetry settings.

Defensive priority

Defenders should prioritize verifying exposure and applying patches or mitigations, focusing on BGP configurations and telemetry settings.

Recommended defensive actions

• Verify BGP configurations and telemetry settings
• Apply patches or mitigations for affected versions
• Monitor for suspicious BGP activity
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions, retest remediated assets
• Confirm whether affected product deployments exist in managed environments

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and potential impact. However, specific details on exploitation or victim data are not provided. The issue requires defenders to verify BGP configurations and telemetry settings. Evidence is limited to public sources and may not reflect real-world exploitation.

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.