Medium severity · published Sep 16, 2026
CVE-2026-86107
The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability when processing tunneled IP fragments between authenticated overlay neighbors
5.9
CVSS
0.4%
EPSS
No
On KEV
Description
The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability when processing tunneled IP fragments between authenticated overlay neighbors. This vulnerability impacts the VeloCloud VCMP tunnel protocol only. A successful exploit can cause the affected process to terminate and restart, leading to a temporary disruption of traffic. Hosts on the internet that are unauthenticated and unable to form an overlay peer relationship can not trigger the vulnerable logic.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VE
VeloCloud · Arista Networks
1.0.0.0 before 5.2.0.0; 5.2.0.0 before 5.2.7.0; 6.1.0.0 before 6.1.5.0; 6.4.0.0 before 6.4.2.0 · source: vendor
VG
VeloCloud Gateway · Arista Networks
1.0.0.0 before 5.2.0.0; 5.2.0.0 before 5.2.7.0; 6.1.0.0 before 6.1.5.0; 6.4.0.0 before 6.4.2.0 · source: vendor