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.

CVSS 4.0

6.9CVSS: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 3.1

5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

EPSS

1.1% chance of exploitation in the next 30 days; higher than 65% of CVEs (scores of 2026-10-25)

CISA KEV

listed 2026-06-09, due 2026-06-23

CWE

CWE-1023

Published

2026-06-05

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• arista:eos

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

Check your stackJSON