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Known exploited vulnerability

CVE-2026-7473

mediumCVSS 4.0 6.9In CISA KEVEPSS 1.1%Published · Arista Networks

The short answer

CVE-2026-7473 affects Arista Networks EOS and is rated medium (CVSS 6.9). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-06-09: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-1023.

Severity

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/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:X/V:X/RE:X/U:X

Exploited (CISA KEV)

Yes, since Jun 9, 2026

Federal due date Jun 23, 2026

EPSS, next 30 days

1.1%

Higher than 66% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
None
User interaction
None
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Affected products

EOS. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-7473 being exploited?

Yes. CISA added CVE-2026-7473 to its Known Exploited Vulnerabilities catalog on 2026-06-09, with a federal remediation due date of 2026-06-23.

How do I fix CVE-2026-7473?

CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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