Arista EOS up to 4.36.0.1F gRPC Network Management Interface code injection

Summaryinfo

A vulnerability categorized as very critical has been discovered in Arista EOS up to 4.36.0.1F. This issue affects some unknown processing of the component gRPC Network Management Interface. Executing a manipulation can lead to code injection. The identification of this vulnerability is CVE-2026-73464. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Arista EOS up to 4.36.0.1F. It has been declared as very critical. This vulnerability affects an unknown functionality of the component gRPC Network Management Interface. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

On affected platforms running Arista EOS with gRPC Network Management Interface (gNMI) enabled, a specially crafted request could allow a malicious authenticated client with gRPC Network Management Interface (gNMI) access to execute arbitrary code with root privileges on the switch.

The advisory is available at arista.com. This vulnerability was named CVE-2026-73464 since 08/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/16/2026). This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 4.30.0F, 4.31.0F, 4.32.0F or 4.33.0F eliminates this vulnerability.

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Productinfo

Vendor

• Arista

Name

• EOS

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12
• 4.13
• 4.14
• 4.15
• 4.16
• 4.17
• 4.18
• 4.19
• 4.20
• 4.21
• 4.22
• 4.23
• 4.24
• 4.25
• 4.26
• 4.27
• 4.28
• 4.29
• 4.30
• 4.31
• 4.32
• 4.33.8M
• 4.34.7M
• 4.35.5M
• 4.36.0.1F

License

• commercial

CPE 2.3info

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CPE 2.2info

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