CVE-2026-103994CWE-122

CVE-2026-103994

High · published October 14, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
36.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L
EPSS
0.00428 · 36.0th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-10-14T21:18Z
References (1)
https://supportportal.juniper.net/JSA112188 · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 16:16Z
    Junos OS: A crafted OVSDB message crashes vgd and allows remote code execution
    cvelistv5
  • 14 OCT 16:16Z
    Junos OS: A crafted OVSDB message crashes vgd and allows remote code execution
    cvelistv5