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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-73437

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper/destinat

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Status
Published
Published
Updated
Assigning organization
Arista

Description

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper address, and the relay agent would forward it to clients without validating the source. This could allow the attacker to supply clients with malicious network configuration parameters, potentially resulting in traffic interception or denial of service for affected clients.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Arista Networks EOS

Default version status: unaffected

  • 4.36.0 to ≤ 4.36.1Faffected
  • 4.35.0 to ≤ 4.35.5Maffected
  • 4.34.0 to ≤ 4.34.7.1Maffected
  • 4.33.0 to ≤ 4.33.9Maffected

References