What’s Vulnerable › Vulnerabilities
CVE-2026-86107: Security Advisory 0180
- Severity: medium (CVSS 5.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-16 · updated 2026-09-16
- Weakness: CWE-787
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.
Affected products
- Arista Networks VeloCloud: from 1.0.0.0 before 5.2.0.0; from 5.2.0.0 before 5.2.7.0; from 6.1.0.0 before 6.1.5.0; from 6.4.0.0 before 6.4.2.0 — fixed in 5.2.0.0, 5.2.7.0, 6.1.5.0, 6.4.2.0
- Arista Networks VeloCloud Gateway: from 1.0.0.0 before 5.2.0.0; from 5.2.0.0 before 5.2.7.0; from 6.1.0.0 before 6.1.5.0; from 6.4.0.0 before 6.4.2.0 — fixed in 5.2.0.0, 5.2.7.0, 6.1.5.0, 6.4.2.0
How to fix
Upgrade to a fixed version: Arista Networks VeloCloud 5.2.0.0, 5.2.7.0, 6.1.5.0, 6.4.2.0; Arista Networks VeloCloud Gateway 5.2.0.0, 5.2.7.0, 6.1.5.0, 6.4.2.0. Check the vendor advisory for mitigations.
References
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