Vulnerability Intelligence Report
Security Advisory 0174
CVE-2026-73453
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 Active Exploit Signals
CVSS Base Score
10.0
CRITICAL
Exploitability:3.9
Impact Score:6.1
EPSS Probability:0.75%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-94 ↗CWE-94 Improper Control of Generation of Code ('Code Injection')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Arista Networks | EOS | 4.36.0F <= 4.36.1F (affected), 4.35.0F <= 4.35.5M (affected), 4.34.0F <= 4.34.7M (affected), 4.33.0F < 4.34.0F (affected), 4.32.0F < 4.33.0F (affected), 4.31.0F < 4.32.0F (affected), 4.30.0F < 4.31.0F (affected), 4.29.2F < 4.30.0F (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.746%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Arista Networks, Inc. · Vendor · USA |
| Reserved | 2026-08-12T16:42:47 |
| Published | 2026-09-16T09:46:33 |
| Last Updated | 2026-09-17T03:56:37 |
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