What is CVE-2026-120978?

CVE-2026-120978 is a medium-severity vulnerability in Arista Networks Eos, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-11-10.

How severe is CVE-2026-120978?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Arista Networks Eos

CVE-2026-120978

On affected Arista EOS platforms running Border Gateway Protocol with Link State ( BGP-LS) and configured with the Dynamic Path Selection (DPS) consumer role, an attacker who has established an authenticated BGP-LS session with the device can send a crafted message to cause the BGP agent to restart unexpectedly. An Arista Pathfinder deployment is not required.

Published 2026-11-10.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/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/25033-security-a… (vendor-advisory)

Frequently asked questions

What is CVE-2026-120978?: CVE-2026-120978 is a medium-severity vulnerability in Arista Networks Eos, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-11-10.
How severe is CVE-2026-120978?: Medium severity. CVSS v3 base score is 6.5 out of 10.