How severe is CVE-2026-7473?

CVE-2026-7473 has a CVSS score of 5.8/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2026-7473?

Affected package information for CVE-2026-7473 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2026-7473?

No fixed version has been published for CVE-2026-7473 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2026-7473 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-7473 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-7473?

CVE-2026-7473 has an EPSS (Exploit Prediction Scoring System) score of 0.0%, placing it in the 9th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2026-7473 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2026-7473 (Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-06-09. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-06-23. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2026-7473?

CVE-2026-7473 is classified as CWE-1023 (CWE-1023). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2026-7473?

CVE-2026-7473 affects arista eos. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2026-7473 published, and has it been updated?

CVE-2026-7473 was published on June 5, 2026 and was last updated on June 9, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2026-7473: EOS CWE-1023 (Medium 5.8)

EPSS Exploitation Probability

via FIRST.org ↗

0.0%probability of exploitation in next 30 days

Lower Risk9th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Affected Products

1 product · 1 configurations

OS

eosarista

all

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is CVE-2026-7473 in your stack?

O3 detects CVE-2026-7473 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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