- Medium 6.9
- Known exploited (CISA KEV)
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.
Scores
The facts
- Published
- 5 June 2026
- Last changed
- 7 October 2026
- NVD status
- Analyzed
- Severity
- Medium, CVSS 6.9 out of 10 (version 4.0)
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R… - Weakness
- Affects
- arista eos
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 9 June 2026.
- EPSS
- 0.6% chance of exploitation activity in the next 30 days (percentile 50).
Is there a Securelyn advisory?
Not yet. Securelyn writes plain-English advisories for the flaws that matter most to businesses. Subscribe to the digest to hear about them.