What is CVE-2025-8873?

CVE-2025-8873 is a high-severity vulnerability in Arista Networks Eos, classified under CWE-1286. CVSS score: 7.5/10. Published 2026-06-04.

How severe is CVE-2025-8873?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Arista Networks Eos

CVE-2025-8873

On affected platforms running Arista EOS with IPsec configured, a specially crafted packet can cause the dataplane to stop processing all IPsec traffic. The control plane may detect this condition, and attempt to reset the IPsec processing pipeline. After reset traffic may not resume being processed. There is no impact to non-IPsec traffic or to IPsec traffic not originating or terminating on the system. This issue was reported by an Arista customer.

EPSS: 0.004 (31.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Arista Networks Eos — versions 4.33.0M, 4.32.0M, 4.31.0M

Weakness classification (CWE)

CWE-1286

References

psirt@arista.com (vendor-advisory)

Frequently asked questions

What is CVE-2025-8873?: CVE-2025-8873 is a high-severity vulnerability in Arista Networks Eos, classified under CWE-1286. CVSS score: 7.5/10. Published 2026-06-04.
How severe is CVE-2025-8873?: High severity. CVSS v3 base score is 7.5 out of 10.