Arista EOS SysDB Agent Denial of Service via Malformed CVX Client/Server Messages
CVE-2025-5089

7.1HIGH

Key Information:

Vendor

Arista Networks

Status
Eos / Cloudvision Exchange (cvx)
Vendor
CVE Published:
5 June 2026

What is CVE-2025-5089?

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.

Affected Version(s)

EOS / CloudVision eXchange (CVX) CloudVision eXchange 4.34.0F <= 4.34.1F

EOS / CloudVision eXchange (CVX) CloudVision eXchange 4.33.0M <= 4.33.4M

EOS / CloudVision eXchange (CVX) CloudVision eXchange 4.32.0M <= 4.32.6M

References

https://www.arista.com/en/support/advisories-notices/secu...
vendor-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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