CVE-2026-73447

Security Advisory 0162 - gNSI Certz/Bootz OS Command Injection via Crafted Rotate Request

Published Sep 16, 2026 CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
Description
A privileged attacker can exploit certain operation to execute arbitrary commands with root privileges, leading to full device compromise. An authenticated user can exploit gRPC Network Security Interface (gNSI) Certz service on Arista EOS-based products to escalate privileges and execute arbitrary OS commands via a crafted Certz Rotate request. The Bootz service is also affected.

Remediation

Vendor Solution

The following EOS releases contain the fix for this vulnerability: - 4.33.9M and later releases in the 4.33.x train - 4.34.7.1M and later releases in the 4.34.x train - 4.35.6M and later releases in the 4.35.x train - 4.36.1F and later releases in the 4.36.x train No hotfix is available for this vulnerability.


Vendor Workaround

For the Bootz service: - Do not include X509 PEM certificates in the initial CertzProfile during Bootz provisioning. For the Certz service (choose one): Option 1: Disable gNSI Certz entirely (requires manual SSL profile management going forward): switch(config)#management api gnsi switch(config-mgmt-api-gnsi)#no service certz Option 2: Restrict Certz access using a gNSI Authz policy. Apply an authorization policy that limits the Certz Rotate RPC to only explicitly permitted users: switch(config)#management api gnsi switch(config-mgmt-api-gnsi)#service authz To detect potential exploitation, configure auditd to monitor for suspicious child processes spawned by OpenConfig/Octa services: switch(config)#monitor security audit switch(config-audit)#rule group process-creation -a always,exit -F arch=b64 -S execve -k process-create -a always,exit -F arch=b32 -S execve -k process-create EOF switch(config-audit)#monitor group process-creation

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Arista
Arista eos
Vendors & Products Arista
Arista eos
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A privileged attacker can exploit certain operation to execute arbitrary commands with root privileges, leading to full device compromise. An authenticated user can exploit gRPC Network Security Interface (gNSI) Certz service on Arista EOS-based products to escalate privileges and execute arbitrary OS commands via a crafted Certz Rotate request. The Bootz service is also affected.
Title Security Advisory 0162 - gNSI Certz/Bootz OS Command Injection via Crafted Rotate Request
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Arista
Published
Updated
Sep 17, 2026, 11:48 AM
Reserved
Aug 12, 2026, 4:42 PM
Status
Awaiting Analysis
Published
Sep 16, 2026, 7:16 AM
Modified
Sep 17, 2026, 12:18 PM