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Vulnerability record · CVE-2026-73456 · published 16 September 2026

CVE-2026-73456: Code injection vulnerability

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.

9.2 CVSS 4.0 Critical EPSS 0.70% · top 49.0% CWE-94 · Code injection Awaiting Analysis
9.2CVSS 4.0 base score
0.70%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
17 Sep 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158

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Source: NIST National Vulnerability Database (record CVE-2026-73456), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.