Medium severity · published Sep 16, 2026
CVE-2026-73445
On affected platforms running Arista EOS, an issue with the gRPC Network Security Interface (gNSI) Authz Rotate RPC may cause an incorrect Authz policy which was uploaded in the ongoing RPC stream to
4.9
CVSS
0.4%
EPSS
No
On KEV
Description
On affected platforms running Arista EOS, an issue with the gRPC Network Security Interface (gNSI) Authz Rotate RPC may cause an incorrect Authz policy which was uploaded in the ongoing RPC stream to become active. This does not affect Bootz.
This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
EOS · Arista Networks
4.36.0F through 4.36.0.1F; 4.35.0F through 4.35.5M; 4.34.0F through 4.34.7M; 4.33.0F through 4.33.8M; 4.32.0F before 4.33.0F; 4.31.0F before 4.32.0F · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73445
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73445
www.arista.com
https://www.arista.com/en/support/advisories-notices/security-advisory/24723-security-advisory-0167
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