Quick answers
- Is CVE-2024-27890 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2024-27890 being exploited in the wild.
- How severe is CVE-2024-27890?
- Critical severity, with a CVSS score of 9.6, published 4 June 2026.
- Which products and versions are affected?
- Arista Networks EOS All versions with OpenConfig configured.
- Is there a fix for CVE-2024-27890?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2024-27890 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2024-27890?
- Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A vulnerability in Arista EOS, specifically when the OpenConfig management interface is enabled, allows a gNMI Set request to be processed even when it should have been rejected. This is classified as a missing authentication for a critical function (CWE-306). An attacker with network access and low-level privileges (PR:L) can exploit this to modify the device configuration. The impact includes high integrity and availability loss as the switch may be reconfigured in a way that disrupts operations or alters security postures. The vulnerability is reachable over the network via the gNMI service.
Affected products
- Arista Networks EOS All versions with OpenConfig configured
Timeline
- 2026-06-04: advisory: Initial advisory publication by Arista Networks