CVE-2025-5089: CWE-20: Improper Input Validation in Arista Networks EOS / CloudVision eXchange (CVX)
In a CVX cluster, an EOS switch connected to a CVX server is not resilient to certain malformed messages received from the connected CVX server. Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted.
AI Analysis
Technical Summary
This vulnerability involves improper input validation in the communication between EOS switches and CVX servers within a CVX cluster. Malformed messages sent from either side can cause the Sysdb agent on the EOS switch or agents on the CVX server to crash, resulting in a soft reset of the switch or instability of the CVX cluster. The attack requires an attacker to already have high privilege access to the connected device to send custom TCP packets. Switches not connected to a CVX server are not impacted.
Potential Impact
Successful exploitation causes denial of service by crashing critical agents on EOS switches or CVX servers, leading to switch resets or cluster instability. There is no impact on confidentiality or integrity. The vulnerability requires high privilege access, limiting the attack surface.
Mitigation Recommendations
No official patch or remediation level has been published yet. Since the vulnerability requires high privilege access, limiting administrative access to devices and monitoring for unusual activity is advisable. Check the vendor advisory regularly for updates and apply official fixes once available.
CVE-2025-5089: CWE-20: Improper Input Validation in Arista Networks EOS / CloudVision eXchange (CVX)
Description
In a CVX cluster, an EOS switch connected to a CVX server is not resilient to certain malformed messages received from the connected CVX server. Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper input validation in the communication between EOS switches and CVX servers within a CVX cluster. Malformed messages sent from either side can cause the Sysdb agent on the EOS switch or agents on the CVX server to crash, resulting in a soft reset of the switch or instability of the CVX cluster. The attack requires an attacker to already have high privilege access to the connected device to send custom TCP packets. Switches not connected to a CVX server are not impacted.
Potential Impact
Successful exploitation causes denial of service by crashing critical agents on EOS switches or CVX servers, leading to switch resets or cluster instability. There is no impact on confidentiality or integrity. The vulnerability requires high privilege access, limiting the attack surface.
Mitigation Recommendations
No official patch or remediation level has been published yet. Since the vulnerability requires high privilege access, limiting administrative access to devices and monitoring for unusual activity is advisable. Check the vendor advisory regularly for updates and apply official fixes once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Arista
- Date Reserved
- 2025-05-22T16:26:45.461Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a22fdf3e29bf47b50937305
Added to database: 06/05/2026, 16:48:51 UTC
Last enriched: 06/13/2026, 09:31:44 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 47
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