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6.9
CVSS
Medium

CVE-2026-7473

PUBLISHED

Arista EOS Unexpected Tunnel Protocol Decapsulation and Forwarding Bypass

Exploited in the wild Remote Low complexity No user interaction
Vendor
Arista Networks
Product
EOS
Published
Jun 05, 2026
EPSS
—

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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.

Weaknesses (CWE)

  • CWE-1023

    Incomplete Comparison with Missing Factors

CVSS scores

CVSS v4.0 6.9 Medium

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

CVSS v3.1 5.8 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Exploitation status

Exploited in the wild

Recorded 2026-06-05 16:40:23 UTC · Source

References

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source Added
CVE First 2026-06-05 16:40 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel