Vulnerability Intelligence Report
Under certain circumstances, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.
CVE-2026-73456
Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.
No Active Exploit Signals
CVSS Base Score
10.0
CRITICAL
Exploitability:3.9
Impact Score:6.1
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
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 | 4.36.0 <= 4.36.1F (affected), 4.35.0 <= 4.35.5M (affected), 4.34.2F <= 4.34.7M (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Arista Networks, Inc. · Vendor · USA |
| Reserved | 2026-08-12T16:45:03 |
| Published | 2026-09-16T18:54:59 |
| Patch Date | 2026-09-09 |
| Last Updated | 2026-09-17T11:39:23 |
Community Chatter & Buzz