CVE-2026-73453

Security Advisory 0174

Published: Sep 16, 2026Updated: Sep 17, 2026 Sources: CVE List NVDCWE-94

10.0CRITICAL

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-94

Affected Products

Arista Networks

commercial·US

EOSOn-prem

Networking Infrastructure / router-switch

Exploitability

Official Patch Available

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

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

arista.com

News mentions

InfraTrust report warns network management systems under attack
en-us·BleepingComputer·Sep 23, 2026 Exploited Cisco Secure Firewall Management Center zero-day

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