{"id":"CVE-2026-103994","title":"A Heap-based Buffer Overflow vulnerability in the VXLAN Gateway Daemon (vgd) of Juniper Networks Junos OS allows a malicious or compromised SDN-controller to cause a complete outage of the OVSDB control plane and possibly remote code exe…","summary":"A Heap-based Buffer Overflow vulnerability in the VXLAN Gateway Daemon (vgd) of Juniper Networks Junos OS allows a malicious or compromised SDN-controller to cause a complete outage of the OVSDB control plane and possibly remote code exe…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"Juniper Networks","product":"Junos OS","affected":["junos_os < 23.2R2-S7.7","junos_os >= 23.4 < 23.4R2-S8.13","junos_os >= 24.2 < 24.2R2-S5.5","junos_os >= 24.4 < 24.4R2-S5","junos_os >= 25.2 < 25.2R2-S2","junos_os >= 25.4 < 25.4R1-S3","junos_os >= 26.2 < 26.2R1-S2"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:24:19.073","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103994","references":[{"url":"https://supportportal.juniper.net/JSA112188","label":"sirt@juniper.net"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-14T20:35:56.954373Z"},"ingestedAt":"2026-10-14T17:44:53.672Z","epss":0.00429,"epssPercentile":0.36958,"slug":"CVE-2026-103994","body":"## Overview\n\nA Heap-based Buffer Overflow vulnerability in the VXLAN Gateway Daemon (vgd) of Juniper Networks Junos OS allows a malicious or compromised SDN-controller to cause a complete outage of the OVSDB control plane and possibly remote code execution.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}