Riskcovery

CVE-2026-73453

Security Advisory 0174

State
Published
Severity
9.5 Critical
Published
Sep 16, 2026
Updated
Sep 17, 2026
Reserved
Aug 12, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.09.5 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HArista
3.110.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HArista

Weaknesses

  • CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

ProductVersions
EOSArista Networks
  • 4.36.0F through 4.36.1FAffected
  • 4.35.0F through 4.35.5MAffected
  • 4.34.0F through 4.34.7MAffected
  • 4.33.0F to before 4.34.0FAffected
  • 4.32.0F to before 4.33.0FAffected
  • 4.31.0F to before 4.32.0FAffected
  • 4.30.0F to before 4.31.0FAffected
  • 4.29.2F to before 4.30.0FAffected

References

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