What is CVE-2026-121293?

CVE-2026-121293 is a medium-severity vulnerability in Arista Networks Eos, classified under NULL Pointer Dereference. CVSS score: 4.4/10. Published 2026-11-10.

How severe is CVE-2026-121293?

Medium severity. CVSS v3 base score is 4.4 out of 10.

NULL pointer dereference in Arista Networks Eos

CVE-2026-121293

On affected EOS-based platforms, an attacker who controls a Border Gateway Protocol (BGP) peer can send a crafted BGP message over an established session with the Dynamic Path Selection (DPS) address family negotiated. This can cause the BGP process to terminate unexpectedly, resetting all BGP sessions and disrupting routing services until the process restarts.

Published 2026-11-10.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Arista Networks Eos

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.arista.com/en/support/advisories-notices/security-advisory/25032-security-a… (vendor-advisory)

Frequently asked questions

What is CVE-2026-121293?: CVE-2026-121293 is a medium-severity vulnerability in Arista Networks Eos, classified under NULL Pointer Dereference. CVSS score: 4.4/10. Published 2026-11-10.
How severe is CVE-2026-121293?: Medium severity. CVSS v3 base score is 4.4 out of 10.