CVE-2026-103994
Junos OS: A crafted OVSDB message crashes vgd and allows remote code execution
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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 execution.
| CWE | CWE-122 |
| Vendor | juniper networks |
| Product | junos os |
| Published | Oct 14, 2026 |
| Last Updated | Oct 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Juniper Networks / Junos OS
0 < 23.2R2-S7.7 23.4 < 23.4R2-S8.13 24.2 < 24.2R2-S5.5 24.4 < 24.4R2-S5 25.2 < 25.2R2-S2 25.4 < 25.4R1-S3 26.2 < 26.2R1-S2