CVE-2025-5089

Arista EOS SysDB Agent Denial of Service via Malformed CVX Client/Server Messages

MEDIUM

6.5

CVSS Score

Published: June 5, 2026 at 03:44 PM UTC

Updated: October 7, 2026 at 08:10 AM UTC

2 products affected across 1 vendorArista EOSCloudvision Exchange

Using EOS / CloudVision eXchange (CVX) by Arista Networks?

Get instant alerts when new vulnerabilities affect EOS / CloudVision eXchange (CVX) - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM6.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cloudvision Exchange · Arista Networks

60%

4.30.0 ≤ v < 4.31.04.31.0M ≤ v ≤ 4.31.8M4.32.0M ≤ v ≤ 4.32.6M4.33.0M ≤ v ≤ 4.33.4M4.34.0F ≤ v ≤ 4.34.1F4.30.0 4.31.0M 4.32.0M 4.33.0M 4.34.0F

Affected range stops below 4.31.0, so it looks safe — our inference, not a vendor statement

Arista EOS · Arista Networks

60%

4.30.0 ≤ v < 4.31.04.31.0M ≤ v ≤ 4.31.8M4.32.0M ≤ v ≤ 4.32.6M4.33.0M ≤ v ≤ 4.33.4M4.34.0F ≤ v ≤ 4.34.1F4.30.0 4.31.0M 4.32.0M 4.33.0M 4.34.0F

Affected range stops below 4.31.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126

References (1)

Vendor Advisory

Source: cverecord

https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMArista

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-20

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card