CVE-2026-73437

CriticalCVSS 9.6/10Last modified Sep 17, 2026

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.

Metrics

CVSS 3.1 9.6/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-345

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

No affected versions have been published.

Timeline

Published
Sep 15, 2026
Last modified
Sep 17, 2026
NVD status
Awaiting Analysis

Related CVEs from 2026

CVE-2026-734385.3On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, an unauthenticated attacker on the samCVE-2026-734397.5On affected platforms running Arista EOS, if OpenConfig is configured and running a gNMI server on the system, and if gNSI Pathz is configurCVE-2026-73448.8Use after free in Accessibility in Google Chrome on Windows prior to 147.0.7727.138 allowed a remote attacker who had compromised the renderCVE-2026-734404.2On affected platforms running Arista EOS with Simple Network Management Protocol (SNMP) configured, SNMPv3 local or remote user credentials CVE-2026-734423.0On affected platforms running Arista EOS with VRRP enabled, the peer device VRRP authentication credentials are logged in cleartext on the sCVE-2026-734434.7On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 neCVE-2026-734444.7On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) authentication configured, an unauthenticated attackerCVE-2026-734454.9On affected platforms running Arista EOS, an issue with the gRPC Network Security Interface (gNSI) Authz Rotate RPC may cause an incorrect ACVE-2026-734467.4On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-ICVE-2026-734479.1A privileged attacker can exploit certain operation to execute arbitrary commands with root privileges, leading to full device compromise. ACVE-2026-734495.9On affected platforms running Arista EOS with both 802.1X port authentication and the RADIUS proxy feature configured with dynamic authorizaCVE-2026-73458.3Insufficient validation of untrusted input in Feedback in Google Chrome prior to 147.0.7727.138 allowed a remote attacker who had compromise
CVE-2026-73437: Critical severity, CVSS 9.6 | Vulnix