CVE-2024-27890 Missing authorization in EOS
Attackers can apply unauthorized configuration changes to Arista EOS switches via gNMI when OpenConfig is enabled without SSL profiles.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-27890?
CVE-2024-27890 is a high-severity missing authorization vulnerability in Arista Networks EOS, published on 4 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should have been rejected. This can result in unexpected configuration being applied to the switch.
Weakness: CWE-306
Which versions are affected by CVE-2024-27890?
How do I fix CVE-2024-27890?
No fix has been published for CVE-2024-27890 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2024-27890 being exploited?
There is no known exploitation of CVE-2024-27890 in the wild and no public exploit code.
Sources
Also known as GHSA-rrpr-947m-3fgh.