What is CVE-2026-7473?
On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN (Virtual Extensible LAN), decap-groups, or a GRE (Generic Routing Encapsulation) tunnel interface—is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packet with a destination IP matching its configured decapsulation IP. This occurs because the switch does not verify the tunnel protocol type, potentially leading to the unexpected processing of non-configured tunnel traffic. This issue has been reported as being exploited in the wild.
The record classifies CVE-2026-7473 under weakness class CWE-1023. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 145 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 5.8 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N - CVSS v4.0 base score
- 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N - EPSS (FIRST)
- 0.6% probability of exploitation in the next 30 days, higher than 49.5% of all scored CVEs
- CISA KEV
- Listed since 2026-06-09, federal remediation deadline 2026-06-23
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2026-06-05, last modified 2026-10-07
Is CVE-2026-7473 being exploited?
CISA added CVE-2026-7473 to the Known Exploited Vulnerabilities catalog on 2026-06-09, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-06-23 under BOD 22-01. Weaponised exploit code for CVE-2026-7473 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 35 in the Threadlinqs vulnerability feed.
Affected products and versions
- Arista Networks: EOS
How to fix CVE-2026-7473
Vendor advisory: https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137. Because CVE-2026-7473 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-06-23. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-7473
1 tracked threat in the Threadlinqs corpus references CVE-2026-7473, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.