CyberSecBulletin
CVE-2026-73461NVD status: Awaiting Analysis

EOS: Incorrect Privilege Assignment

Published Updated By the CyberSecBulletin desk

CVE-2026-73461 is a high-severity incorrect privilege assignment vulnerability in EOS from Arista Networks, with a CVSS 3.1 base score of 8.0 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists versions 4.30.0F, 4.31.0F, 4.32.0F as the first without the flaw, so updating EOS to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.39% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update EOS to 4.30.0F or 4.31.0F or 4.32.0F, whichever matches your release line, or a later version.
  2. Read the advisory on arista.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
Arista NetworksEOS4.29.0F up to, but not including, 4.30.0F; 4.30.0F up to, but not including, 4.31.0F; 4.31.0F up to, but not including, 4.32.0F; 4.32.0F through 4.32.11M; 4.33.0F through 4.33.8M; 4.34.0F through 4.34.7M; 4.35.0F through 4.35.5M; 4.36.0F through 4.36.0.1F4.30.0F, 4.31.0F, 4.32.0F

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
HighAdministrator-level access is required first.
User interaction
NoneNo action by a victim is required.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (arista.com).

Scoring systemScoreSeverityScored by
CVSS 4.09.4CriticalCNA (arista.com)
CVSS 3.18.0HighCNA (arista.com)

Official description

On affected EOS platforms with AAA-based gRPC authorization enabled for OpenConfig, gRPC requests of an authenticated user to OpenConfig may use the wrong privilege level, resulting in an authorization using the wrong AAA method list. This does not impact non-gRPC OpenConfig requests such as NETCONF.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Incorrect Privilege Assignment

A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

How developers prevent this class of flaw

  • Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
  • Run your code using the lowest privileges that are required to accomplish the necessary tasks. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.

More Incorrect Privilege Assignment vulnerabilities (CWE-266)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in EOS

All EOS vulnerabilities

Recent Incorrect Privilege Assignment vulnerabilities

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