CVE-2026-121370: Security Advisory 0224

Published Nov 10, 2026

Updated

On affected platforms running Arista EOS with Precision Time Protocol (PTP) configured, an unauthenticated attacker with network access to a PTP-enabled port can create a denial of service (DoS) condition by sending traffic to the system.

Affected Software

1 affected component

Arista EOS

Event History

Nov 10, 2026

CVE Published

via MITRE·08:10 PM

Data Sourced

via MITRE·08:10 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Which systems are exposed to this denial-of-service issue?

Affected Arista EOS platforms are exposed when Precision Time Protocol (PTP) is configured and the attacker can reach a PTP-enabled port over the network.

Does exploitation require credentials or user interaction?

No. The vulnerability can be exploited by an unauthenticated attacker with network access to a PTP-enabled port, and no user interaction is required.

What is the practical impact of successful exploitation?

An attacker can create a denial-of-service condition by sending traffic to the system. The provided information identifies availability impact, with no stated confidentiality or integrity impact.

CVE-2026-121370: Security Advisory 0224

Affected Software

Event History

Frequently Asked Questions

Which systems are exposed to this denial-of-service issue?

Does exploitation require credentials or user interaction?

What is the practical impact of successful exploitation?

Company

Resources

Contact

Frequently Asked Questions

Which systems are exposed to this denial-of-service issue?

Does exploitation require credentials or user interaction?

What is the practical impact of successful exploitation?