CVE-2026-73469

Summary

When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop. Consequently, traffic that should be dropped based on these routes could still be processed and forwarded by the device.

This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.

Affected Software

Weaknesses

• CWE-863: CWE-863 Incorrect Authorization

Workarounds

No mitigation exists for this issue.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://www.arista.com/en/support/advisories-notices/security-advisory/24732-security-advisory-0176

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