CVE-2026-73439— Security Advisory 0164
Quick assessment
Affected
Arista Networks EOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
On affected platforms running Arista EOS, if OpenConfig is configured and running a gNMI server on the system, and if gNSI Pathz is configured and a gNSI Pathz policy is present on the system, then gNMI may fail to correctly enforce the rules in this policy if
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I. Basic Information for CVE-2026-73439
Vulnerability Information
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Vulnerability Title
Security Advisory 0164
Source: CVE Program / CVE List V5
Vulnerability Description
On affected platforms running Arista EOS, if OpenConfig is configured and running a gNMI server on the system, and if gNSI Pathz is configured and a gNSI Pathz policy is present on the system, then gNMI may fail to correctly enforce the rules in this policy if both a group rule and a user rule for the same path is present in the policy. Under certain conditions, this can lead to an authenticated user gaining unauthorized permission to read or write gNMI paths that the Pathz policy is intended to restrict.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-842
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Arista Networks | EOS | 4.33.2F ~ 4.33.8M | - |
|
II. Public POCs for CVE-2026-73439
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-73439 (1)
-
Security Advisory 0164 - Arista vendor-advisory
Same Patch Batch · Arista Networks · 2026-09-16 · 21 CVEs total
| CVE-2026-73453 | 10.0 CRITICAL | Security Advisory 0174 |
| CVE-2026-73447 | 9.1 CRITICAL | Security Advisory 0162 - gNSI Certz/Bootz OS Command Injection via Crafted Rotate Request |
| CVE-2026-73464 | 8.8 HIGH | Security Advisory 0166 |
| CVE-2026-73435 | 8.2 HIGH | Security Advisory 0171 |
| CVE-2026-73454 | 8.1 HIGH | Security Advisory 0165 |
| CVE-2026-86108 | 8.0 HIGH | Security Advisory 0181 |
| CVE-2026-73461 | 8.0 HIGH | Security Advisory 0163 |
| CVE-2026-73455 | 7.5 HIGH | Security Advisory 0173 |
| CVE-2026-2380 | 7.4 HIGH | Security Advisory 0168 |
| CVE-2026-73450 | 6.9 MEDIUM | Security Advisory 0161 |
| CVE-2026-86109 | 6.6 MEDIUM | Security Advisory 0182 |
| CVE-2026-77190 | 6.5 MEDIUM | Security Advisory 0177 |
| CVE-2026-73468 | 6.5 MEDIUM | Security Advisory 0175 |
| CVE-2026-73436 | 6.5 MEDIUM | Security Advisory 0171 |
| CVE-2026-73469 | 5.8 MEDIUM | Security Advisory 0176 |
| CVE-2026-73438 | 5.3 MEDIUM | Security Advisory 0172 |
| CVE-2026-73463 | 5.3 MEDIUM | Security Advisory 0169 |
| CVE-2026-73445 | 4.9 MEDIUM | Security Advisory 0167 |
| CVE-2026-73440 | 4.2 MEDIUM | Security Advisory 0178 |
| CVE-2026-19640 | 4.2 MEDIUM | Security Advisory 0170 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-73439
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