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High severity · published Sep 16, 2026
CVE-2026-73439
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 gN
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
EOS · Arista Networks
4.33.2F through 4.33.8M; 4.34.0F through 4.34.6M; 4.35.0F through 4.35.5M; 4.36.0F through 4.36.0.1F · source: vendor
Affected product
EO
EOS
Arista Networks
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73439
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73439
www.arista.com
https://www.arista.com/en/support/advisories-notices/security-advisory/24720-security-advisory-0164
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