CVE-2026-73456

criticalpriority · track · 0EPSS 0.007 · 53 %ileDENL
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.69% (53rd) EPSS
CVSS 10 · critical
Is it mine?
5 products
Check your exposure
Who says so?
2 sources
cert_bund · ncsc_nl

EPSS · scored 2026-10-27

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

10.0
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.2–10

v3.110criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:Hsecondary · psirt@arista.comexploitability 3.9 · impact 6
v4.09.2criticalCVSS: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:X/V:X/RE:X/U:Xsecondary · psirt@arista.com
v4.07.2highCVSS: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:U/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:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-532USCWE-94US
03

affected products (5)

Products and version ranges known to be affected.

04

advisories (2)

Vendor and ecosystem advisories describing this.

  • NCSC-2026-0366Kwetsbaarheden verholpen in Arista EOSNL2026-09-11csaf · ncsc_nlNL

    Arista heeft kwetsbaarheden verholpen in de Arista EOS-platform.

  • WID-SEC-W-2026-3287Arista EOS: Mehrere SchwachstellenDeutsch2026-09-09csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Arista EOS ausnutzen, um erweiterte Berechtigungen, sogar Administratorrechte, zu erlangen, beliebigen Code, einschließlich Root-Code, auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen sowie Denial-of-Service-Zustände herbeizuführen.

05

sources

Which sources assert this record, and when.

cert_bundncsc_nlNVDCVE.orgMITRE
published 2026-09-16modified 2026-09-17
06

references (1) nvd

External citations — patches, advisories, analysis.

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