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.
Fix
Public exploits 1
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
CISA KEV required action · due 2026-06-23
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Added to the catalog 2026-06-09. CISA KEV
Patch, vendor advisory and mitigation references on NVD 1
- https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137 Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.9 · in KEV · aristaNVD modified 2026-10-25 23:10
Affected (CPE criteria) 1
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
References 3
- https://www.arista.com/en/support/advisories-notices/security-advisory/22872-security-advisory-0137 Broken Link
- https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137 Mitigation, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7473 US Government Resource