CVE-2026-101982 Juniper Networks CVE debrief

Who should care

Junos OS and Junos OS Evolved users, network administrators, and security teams should prioritize verifying and applying patches, assessing exposure, and monitoring for suspicious activity. Affected operators, platforms, and vulnerability-management teams should review official advisories and plan vendor-supported updates or mitigations.

Why it matters

CVE-2026-101982 is a critical Stack-based Buffer Overflow vulnerability in Juniper Networks Junos OS and Junos OS Evolved that requires immediate attention from users and administrators.

• Potential root code execution on Junos OS
• Potential rpd crash on Junos OS Evolved
• Need to verify and apply patches
• Need to assess exposure and prioritize remediation

Technical summary

A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a configured BGP/EVPN peer to cause root code execution on Junos OS or an rpd crash on Junos OS Evolved via protocol-valid route advertisements for an EVPN-VPWS service. The vulnerability affects Junos OS and Junos OS Evolved, and users should verify and apply patches from Juniper Networks to prevent potential root code execution or rpd crashes. Users should also assess exposure and prioritize remediation.

Defensive priority

Junos OS and Junos OS Evolved users should prioritize verifying and applying patches, assessing exposure, and monitoring for suspicious activity.

Recommended defensive actions

• Verify and apply patches from Juniper Networks
• Assess exposure and prioritize remediation
• Monitor for suspicious activity and anomalies
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• 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 vendor-provided information is limited. The vulnerability is a Stack-based Buffer Overflow in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved. Defenders should verify affected product deployments, review official advisories, and plan vendor-supported updates or mitigations.

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.