CVE-2024-27890: CWE-306 Missing Authentication for Critical Function in Arista Networks EOS
CVE-2024-27890 is a high-severity vulnerability in Arista Networks EOS affecting versions 4. 24. 0 through 4. 29. 0. It involves missing authentication for a critical function where a gNMI Set request can be executed despite it being expected to be rejected. This flaw allows unexpected configuration changes to be applied to the switch, potentially impacting device operation and security. No official patch or remediation guidance has been provided yet by the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability (CVE-2024-27890) affects Arista EOS platforms configured with OpenConfig. Due to missing authentication controls (CWE-306), a gNMI Set request can be processed when it should be denied, leading to unauthorized configuration changes on the switch. The issue impacts multiple EOS versions from 4.24.0 to 4.29.0. The CVSS 4.0 base score is 7.2, indicating a high severity with network attack vector, low attack complexity, no user interaction, and requiring low privileges but causing high impact on confidentiality and availability. No patch or official remediation level has been disclosed by Arista as of the publication date.
Potential Impact
The vulnerability allows an attacker with low privileges to send a gNMI Set request that is improperly accepted, resulting in unexpected and unauthorized configuration changes on the affected Arista EOS switches. This can disrupt network operations or compromise device integrity. There are no known exploits in the wild currently, but the potential impact on device configuration is significant.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the gNMI interface and ensure that only trusted and authenticated users can send configuration requests. Monitor for unusual configuration changes. Follow Arista Networks' advisories for updates on patches or mitigations.
CVE-2024-27890: CWE-306 Missing Authentication for Critical Function in Arista Networks EOS
Description
CVE-2024-27890 is a high-severity vulnerability in Arista Networks EOS affecting versions 4. 24. 0 through 4. 29. 0. It involves missing authentication for a critical function where a gNMI Set request can be executed despite it being expected to be rejected. This flaw allows unexpected configuration changes to be applied to the switch, potentially impacting device operation and security. No official patch or remediation guidance has been provided yet by the vendor. There are no known exploits in the wild at this time.
CVSS v4.0
Score 7.2high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2024-27890) affects Arista EOS platforms configured with OpenConfig. Due to missing authentication controls (CWE-306), a gNMI Set request can be processed when it should be denied, leading to unauthorized configuration changes on the switch. The issue impacts multiple EOS versions from 4.24.0 to 4.29.0. The CVSS 4.0 base score is 7.2, indicating a high severity with network attack vector, low attack complexity, no user interaction, and requiring low privileges but causing high impact on confidentiality and availability. No patch or official remediation level has been disclosed by Arista as of the publication date.
Potential Impact
The vulnerability allows an attacker with low privileges to send a gNMI Set request that is improperly accepted, resulting in unexpected and unauthorized configuration changes on the affected Arista EOS switches. This can disrupt network operations or compromise device integrity. There are no known exploits in the wild currently, but the potential impact on device configuration is significant.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the gNMI interface and ensure that only trusted and authenticated users can send configuration requests. Monitor for unusual configuration changes. Follow Arista Networks' advisories for updates on patches or mitigations.
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: 6/4/2026, 10:48:37 PM
Last enriched: 6/4/2026, 11:04:04 PM
Last updated: 6/5/2026, 4:19:55 AM
Views: 5
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