CVE-2026-73453
Security Advisory 0174
CVSS Score
10.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-94 |
| Vendor | arista networks |
| Product | eos |
| Published | Sep 16, 2026 |
| Last Updated | Sep 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Arista Networks / EOS
4.36.0F ≤ 4.36.1F 4.35.0F ≤ 4.35.5M 4.34.0F ≤ 4.34.7M 4.33.0F < 4.34.0F 4.32.0F < 4.33.0F 4.31.0F < 4.32.0F 4.30.0F < 4.31.0F 4.29.2F < 4.30.0F