Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability

Arista Extensible Operating System

Arista Extensible Operating System (EOS) contains an incomplete comparison with missing factors vulnerability when the switch incorrectly decapsulate and forwards other unexpected tunneled packet with a destination IP matching its configured decapsulation IP. Added to CISA KEV on 2026-06-09 (federal deadline 2026-06-23).

First seen: 9 Jun 2026
Last update: 9 Jun 2026, 12:00 UTC
Identifiers: CVE-2026-7473
Source: CISA KEV
On the menu as: VPN & firewalls

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Arista Extensible Operating System
Ids: CVE-2026-7473

Arista Extensible Operating System (EOS) contains an incomplete comparison with missing factors vulnerability when the switch incorrectly decapsulate and forwards other unexpected tunneled packet with a destination IP matching its configured decapsulation IP. Added to CISA KEV on 2026-06-09 (federal deadline 2026-06-23).

## Steps
1. This touches infrastructure (vpn-edge). Look in terraform, ansible, cloud-init, Dockerfiles and docs for the product and version we run. If it isn't in the repo, say so and list what a human should check on the box.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-7473") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://nvd.nist.gov/vuln/detail/CVE-2026-7473 https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137
https://pwned.coffee/i/arista-extensible-operating-system-incomplete-comparison-cve-2026-7473

Sources

Totalone hot coffee