CVE-2026-7473

Description

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.

Scoring

• CVSS: 5.8 (MEDIUM, 3.1)
• EPSS exploitation probability: Not yet available
• EPSS percentile: Not yet available

CISA KEV status

• Added to KEV: 2026-06-09
• Remediation due date: 2026-06-23
• Known ransomware campaign use: Unknown

Weakness types (CWE)

• CWE-1023

References

• https://www.arista.com/en/support/advisories-notices/security-advisory/22872-security-advisory-0137
• https://www.arista.com/en/support/advisories-notices/security-advisory/24005-security-advisory-0137
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7473

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