CVE-2024-27890: CWE-306 Missing Authentication for Critical Function in Arista Networks EOS
CVE-2024-27890 is a vulnerability in Arista Networks EOS affecting versions 4.24.0 through 4.29.0 where a gNMI Set request can be executed without proper authentication when OpenConfig is configured. This allows unauthorized configuration changes on the switch. The vulnerability is rated high severity with a CVSS 4.0 score of 7.2. No official patch or remediation guidance is currently provided by the vendor.
AI Analysis
Technical Summary
This vulnerability (CVE-2024-27890) involves missing authentication for a critical function in Arista EOS. Specifically, on affected EOS versions with OpenConfig enabled, a gNMI Set request can be accepted and processed when it should have been rejected due to lack of proper authentication controls. This can lead to unauthorized and unexpected configuration changes on the network switch, potentially impacting network stability or security. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no user interaction, and high impact on integrity and availability. No vendor advisory or patch information is available to confirm remediation status.
Potential Impact
An attacker with network access and low privileges can send a gNMI Set request that is improperly authenticated, resulting in unauthorized configuration changes on the affected Arista EOS switches. This can disrupt network operations or compromise device integrity and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to the gNMI interface and monitor for unauthorized configuration attempts if possible.
CVE-2024-27890: CWE-306 Missing Authentication for Critical Function in Arista Networks EOS
Description
CVE-2024-27890 is a vulnerability in Arista Networks EOS affecting versions 4.24.0 through 4.29.0 where a gNMI Set request can be executed without proper authentication when OpenConfig is configured. This allows unauthorized configuration changes on the switch. The vulnerability is rated high severity with a CVSS 4.0 score of 7.2. No official patch or remediation guidance is currently provided by the vendor.
CVSS v4.0
Score 7.2high
Affected software
pkg:github/aristanetworks/eosRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2024-27890) involves missing authentication for a critical function in Arista EOS. Specifically, on affected EOS versions with OpenConfig enabled, a gNMI Set request can be accepted and processed when it should have been rejected due to lack of proper authentication controls. This can lead to unauthorized and unexpected configuration changes on the network switch, potentially impacting network stability or security. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no user interaction, and high impact on integrity and availability. No vendor advisory or patch information is available to confirm remediation status.
Potential Impact
An attacker with network access and low privileges can send a gNMI Set request that is improperly authenticated, resulting in unauthorized configuration changes on the affected Arista EOS switches. This can disrupt network operations or compromise device integrity and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to the gNMI interface and monitor for unauthorized configuration attempts if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Arista
- Date Reserved
- 2024-02-26T18:06:32.160Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2200c5e29bf47b50d9ecc3
Added to database: 06/04/2026, 22:48:37 UTC
Last enriched: 06/12/2026, 10:28:33 UTC
Last updated: 07/31/2026, 19:22:51 UTC
Views: 39
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