What is CVE-2025-7048?

CVE-2025-7048 is a medium-severity vulnerability in Arista Networks Eos, classified under Buffer Access with Incorrect Length Value. CVSS score: 4.3/10. Published 2026-01-06.

How severe is CVE-2025-7048?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Arista Networks Eos

CVE-2025-7048

On affected platforms running Arista EOS with MACsec configuration, a specially crafted packet can cause the MACsec process to terminate unexpectedly. Continuous receipt of these packets with certain MACsec configurations can cause longer term disruption of dataplane traffic.

EPSS: 0.002 (6.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Arista Networks Eos — versions 4.34.3.0, 4.33.0, 4.32.0

Weakness classification (CWE)

CWE-805 — Buffer Access with Incorrect Length Value

References

psirt@arista.com

Frequently asked questions

What is CVE-2025-7048?: CVE-2025-7048 is a medium-severity vulnerability in Arista Networks Eos, classified under Buffer Access with Incorrect Length Value. CVSS score: 4.3/10. Published 2026-01-06.
How severe is CVE-2025-7048?: Medium severity. CVSS v3 base score is 4.3 out of 10.