CVE-2025-5090

Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages

MEDIUM

6.5

CVSS Score

Published: June 5, 2026 at 03:49 PM UTC

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

2 products affected across 1 vendorArista EOSCloudvision Exchange

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in 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 have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.

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 < 4.31.04.31.0 ≤ v < 4.32.04.32.0M ≤ v ≤ 4.32.6M4.33.0M ≤ v ≤ 4.33.4M4.34.0F ≤ v ≤ 4.34.1F4.30.0 4.31.0 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

Affected range stops below 4.32.0, so it looks safe — our inference, not a vendor statement

Arista EOS · Arista Networks

60%

4.30.0 ≤ v < 4.31.04.31.0 ≤ v < 4.32.04.32.0M ≤ v ≤ 4.32.6M4.33.0M ≤ v ≤ 4.33.4M4.34.0F ≤ v ≤ 4.34.1F4.30.0 4.31.0 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

Affected range stops below 4.32.0, 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

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