TI-2025-04564 Aliases CVE-2025-5089 GHSA-xmjq-j83c-q6g4

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

LOW 31CWE-20Published 2026-06-05 · Updated 2026-06-09

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00235 14th percentileScored 2026-11-07

Fix Fixed EOS / CloudVision eXchange (CVX) (Arista Networks): 4.31.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Arista	EOS / CloudVision eXchange (CVX)	4.34.0F – 4.34.1F; 4.33.0M – 4.33.4M; 4.32.0M – 4.32.6M; 4.31.0M – 4.31.8M; 4.30.0 to before 4.31.0	4.31.0	Patch available	CNA

EOS / CloudVision eXchange (CVX) VendorArista Affected 4.34.0F – 4.34.1F; 4.33.0M – 4.33.4M; 4.32.0M – 4.32.6M; 4.31.0M – 4.31.8M; 4.30.0 to before 4.31.0 Fixed in 4.31.0 Patch available CNA

Remediation

Fix · CNA EOS / CloudVision eXchange (CVX) (Arista Networks) Fixed in 4.31.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-06-05
Arista Networks EOS / CloudVision eXchange (CVX) — arista.com/en/support/advisories-notices/security-advisory/…
3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2025-04563 Arista CloudVision Exchange (CVX) Cluster Privilege Escalation via MCS Redis SessionPriority MEDIUM 40
- TI-2025-04565 Arista CloudVision Exchange Cluster Instability via Unexpected Switch MessagesPriority LOW 31
Show all 3 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-5089
2026-10-03 Alias added: GHSA-xmjq-j83c-q6g4

References

Advisory 1

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

TI-2026-79524 Privilege escalation in Arista VeloCloud Orchestrator on-premises KEVCVSS 4.0CRITICAL 9.4
TI-2026-63212 Improper input validation in Arista VeloCloud Orchestrator On-Prem KEVCVSS 4.0CRITICAL 9.5
TI-2026-13992 VeloCloud Orchestrator OS Command Injection KEVCVSS 4.0CRITICAL 10.0
TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8

See all 216 →

Sources

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