CVE-2025-8870 Denial of service in EOS
An attacker with serial console access can cause an unexpected device reload, leading to denial of service on Arista EOS platforms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-8870?
CVE-2025-8870 is a medium-severity denial of service vulnerability in Arista Networks EOS, published on 14 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
On affected platforms running Arista EOS, certain serial console input might result in an unexpected reload of the device.153
Weakness: CWE-248
Which versions are affected by CVE-2025-8870?
How do I fix CVE-2025-8870?
No fix has been published for CVE-2025-8870 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-8870 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8870 exists.
Sources
Also known as GHSA-8rvj-6hp5-gf5x.