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EOS · Vulnerability

CVSS 3.1 9.6 CRITICALCVSS 4.0 6.5 MEDIUMCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-73437

Published

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.

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Affected versions, risk and source history

Exploitation and risk

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Risk history

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Advisory history

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23 Oct 2026 15:48:27 UTC

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

cve-program · CVE-2026-73437 · Published

ChangeIntel

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Sources read 13 Nov 09:00 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current