Exploited vulnerability · CISA KEV

Is CVE-2026-7473 exploited? Yes: in CISA KEV since 9 Jun 2026

Gociux · Arista Extensible Operating System · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-7473, Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 9 Jun 2026, 4 days after it was published. It affects Arista Extensible Operating System. If you run it, CISA's required action is: 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 it is

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.

What to do

1. Check whether you run it. Look for Extensible Operating System in your asset inventory, including appliances and cloud images. Stack check lists every exploited Arista CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 5 Jun 2026.
4. Get told next time. Email alerts when CISA adds a CVE for Arista.

References

• www.arista.com/en/support/advisories-notices/security-advisory/24005-secur
• nvd.nist.gov/vuln/detail/CVE-2026-7473

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in June 2026 · Arista scorecard · act-now radar.