CVE-2026-73453

10 CRITICAL

Published 2026-09-16 · Updated 2026-09-17

AI risk analysis

Summary: The flaw allows an unauthenticated P4Runtime client to execute arbitrary code on affected Arista EOS platforms, posing a significant security risk.
Exploitability: Exploitation requires specific conditions and crafting of malicious packets during session initiation; thus, it is moderately difficult but not impossible.
Blast radius: If exploited, the vulnerability could result in complete administrative control over the switch, impacting network security and integrity.
Prioritized remediation: Disable P4Runtime on Arista EOS platforms or ensure strict access controls are in place to prevent unauthorized sessions.

rcep4runtimearistaeos

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

An unauthenticated P4Runtime (Programming Protocol-Independent Packet Processors Runtime) client can achieve arbitrary code execution under certain conditions on affected platforms running Arista EOS configured with P4Runtime. P4Runtime is disabled by default in Arista EOS. By crafting a malicious packet during the initiation of a P4Runtime session, an attacker can obtain complete administrative control over the compromised switch. This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-94

All references

https://www.arista.com/en/support/advisories-notices/security-advisory/24730-security-advisory-0174

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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