CVE-2025-5090

Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages

State: Published
Severity: 7.1 High
Published: Jun 5, 2026
Updated: Jun 9, 2026
Reserved: May 22, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	Arista
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	Arista

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
EOS / CloudVision eXchange (CVX)Arista Networks	4.34.0F through 4.34.1FAffected 4.33.0M through 4.33.4MAffected 4.32.0M through 4.32.6MAffected 4.31.0 to before 4.32.0Affected 4.30.0 to before 4.31.0Affected

References

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

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