Critical severity · published Sep 16, 2026
CVE-2026-73447
Security Advisory 0162 - gNSI Certz/Bootz OS Command Injection via Crafted Rotate Request
9.1
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
EOS · Arista Networks
4.30.2F before 4.31.0F; 4.31.0F before 4.32.0F; 4.32.0F before 4.33.0F; 4.33.0F through 4.33.8M; 4.34.0F through 4.34.7M; 4.35.0F through 4.35.5M; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73447
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73447
www.arista.com
https://www.arista.com/en/support/advisories-notices/security-advisory/24718-security-advisory-0162
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