CVE-2026-73447 Arista EOS - Command Injection & Privilege Escalation

Arista EOS-based products contain a command injection caused by crafted requests to gRPC Network Security Interface (gNSI) Certz and Bootz services, letting authenticated attackers escalate privileges and execute arbitrary OS commands.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.70% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-78

Vendor fix

Update to the latest version with patches for gNSI Certz and Bootz services.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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