CVE-2026-101945 Juniper Networks CVE debrief

Who should care

Junos OS and Junos OS Evolved users, particularly those with EVPN-enabled routing instances, should review and apply patches, verify EVPN BGP peering relationships, and monitor control-plane adjacencies for disruptions. Operators, platform administrators, vulnerability management teams, and security teams should be aware of the potential impact on network routing and stability.

Why it matters

CVE-2026-101945 is a high-severity vulnerability in Junos OS and Junos OS Evolved that can cause a denial of service when EVPN BGP is enabled. Users should review and apply patches, verify EVPN BGP peering relationships, and monitor control-plane adjacencies.

• Denial of service via EVPN BGP route processing
• Disruption of control-plane adjacencies
• Potential impact on network routing and stability

Technical summary

An Integer Overflow or Wraparound vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows a remote attacker with an established EVPN BGP peering relationship to cause a denial of service via EVPN BGP route processing. The issue affects EVPN-enabled routing instances and can disrupt control-plane adjacencies. Users should review and apply patches, verify EVPN BGP peering relationships, and monitor control-plane adjacencies for disruptions. The vulnerability has a high severity score of 7.5 and is classified as HIGH.

Defensive priority

High priority for Junos OS and Junos OS Evolved users

Recommended defensive actions

• Review and apply Juniper Networks' patches for affected Junos OS and Junos OS Evolved versions
• Verify EVPN BGP peering relationships and routing instances
• Monitor control-plane adjacencies for disruptions
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• 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

Evidence notes

The CVE record and source item provide details on the Integer Overflow or Wraparound vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved. The issue affects EVPN-enabled routing instances and can disrupt control-plane adjacencies. Evidence is limited to the CVE record and source item, and defenders should verify affected scope and apply patches.

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.