Exploited CVEs / CVE-2026-7473
CVE-2026-7473
Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2026-06-23 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Risk summary
Actively exploited Arista Extensible Operating System vulnerability, Medium severity, CVSS v3 5.8. Added to the CISA KEV catalog 2026-06-09.
Senserva AI Opinion for CVE-2026-7473
This Arista EOS flaw is unusual for the KEV catalog: a Medium Severity (CVSS 5.8) packet handling bug where switches incorrectly decapsulate and forward unexpected tunneled packets aimed at their decapsulation IP. CISA confirmed real-world exploitation on 2026-06-09, which suggests attackers are using it to slip traffic past network segmentation. Environments using tunnel decapsulation on Arista switches are the exposed population.
Do this: Update EOS on switches configured with tunnel decapsulation and verify your segmentation rules do not rely on those tunnels being trustworthy.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-7473
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2026-7473
- Published
- 2026-06-09
- Last revised
- 2026-06-09
- Changes tracked
- 1
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
- 2026-06-09 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 5.8; EPSS first scored at 0.8%
- 2026-07-24 EPSS 0.8% to 1.1%
Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.
CISA required action
Federal remediation due date: 2026-06-23 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2026-7473
Check the vendor's security advisory channel for the patched Extensible Operating System versions and workarounds.
Common questions about CVE-2026-7473
Is CVE-2026-7473 actively exploited?
Yes. CVE-2026-7473 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-06-09, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is <1%.
What is the CISA deadline and required action for CVE-2026-7473?
CISA set the federal remediation due date at 2026-06-23, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2026-7473?
Check the vendor's security advisory for the patched Extensible Operating System versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2026-7473?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-7473's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (morning and afternoon US Central).
Scope and sources
- More exploited Arista CVEs
- Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.