CVE-2026-73468 Security Advisory 0175
A crafted packet causes premature expiry of multicast forwarding state, leading to temporary multicast traffic loss on Arista EOS devices.
- 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-2026-73468?
CVE-2026-73468 is a high-severity denial of service vulnerability in Arista Networks EOS, published on 16 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A specially crafted packet can cause the premature expiry of multicast forwarding state on affected interfaces, potentially resulting in temporary multicast traffic loss during the affected period.
Weakness: CWE-670
Which versions are affected by CVE-2026-73468?
How do I fix CVE-2026-73468?
No fix has been published for CVE-2026-73468 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-2026-73468 being exploited?
There is no known exploitation of CVE-2026-73468 in the wild and no public exploit code.
Sources
Also known as GHSA-x98h-73r2-4gwf.