CVE-2026-86107 Security Advisory 0180
Authenticated overlay neighbors can trigger an out-of-bounds write in VeloCloud Edge and Gateway devices, causing process termination and temporary traffic disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86107?
CVE-2026-86107 is a high-severity memory corruption vulnerability in Arista Networks VeloCloud, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2026-86107?
How do I fix CVE-2026-86107?
No fix has been published for CVE-2026-86107 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-86107 being exploited?
There is no known exploitation of CVE-2026-86107 in the wild and no public exploit code.
Sources
Also known as GHSA-wggc-2fwv-g783.