CVE-2025-5089
MEDIUMArista EOS SysDB Agent Denial of Service via Malformed CVX Client/Server Messages
Title source: cnaDescription
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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126
Scores
CVSS v3
6.5
EPSS
0.0024
EPSS Percentile
14.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-20
Status
published
Products (5)
Arista Networks/EOS / CloudVision eXchange (CVX)
4.30.0 - 4.31.0
Arista Networks/EOS / CloudVision eXchange (CVX)
4.31.0M - 4.31.8M
Arista Networks/EOS / CloudVision eXchange (CVX)
4.32.0M - 4.32.6M
Arista Networks/EOS / CloudVision eXchange (CVX)
4.33.0M - 4.33.4M
Arista Networks/EOS / CloudVision eXchange (CVX)
4.34.0F - 4.34.1F
Published
Jun 05, 2026
Tracked Since
Jun 05, 2026