Security Advisory 0180
Summary
| CVE | CVE-2026-86107 |
|---|---|
| State | PUBLISHED |
| Assigner | Arista |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-16 11:16:43 UTC |
| Updated | 2026-09-16 19:10:09 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 8.2 HIGH from [email protected]
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 8.2 | HIGH | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 8.2 | HIGH | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Secondary | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Arista Networks | VeloCloud | affected 1.0.0.0 5.2.0.0 custom | VeloCloud Edge, VeloCloud Gateway |
| CNA | Arista Networks | VeloCloud | affected 5.2.0.0 5.2.7.0 custom | VeloCloud Edge, VeloCloud Gateway |
| CNA | Arista Networks | VeloCloud | affected 6.1.0.0 6.1.5.0 custom | VeloCloud Edge, VeloCloud Gateway |
| CNA | Arista Networks | VeloCloud | affected 6.4.0.0 6.4.2.0 custom | VeloCloud Edge, VeloCloud Gateway |
| CNA | Arista Networks | VeloCloud Gateway | affected 1.0.0.0 5.2.0.0 custom | VeloCloud Gateway |
| CNA | Arista Networks | VeloCloud Gateway | affected 5.2.0.0 5.2.7.0 custom | VeloCloud Gateway |
| CNA | Arista Networks | VeloCloud Gateway | affected 6.1.0.0 6.1.5.0 custom | VeloCloud Gateway |
| CNA | Arista Networks | VeloCloud Gateway | affected 6.4.0.0 6.4.2.0 custom | VeloCloud Gateway |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.arista.com/en/support/advisories-notices/security-advisory/24736-securit... | [email protected] | www.arista.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Solutions
CNA: The following releases contain the fix: - 5.2.7.0 and later in the 5.2.x train - 6.1.5.0 and later in the 6.1.x train - 6.4.2.0 and later in the 6.4.x train - 7.0.0 and later No hotfix is available for this issue.
Workarounds
CNA: No mitigation is available for this issue. Customers should restrict overlay peer relationships to trusted devices and monitor for unexpected fragmentation behavior.