CVE-2026-73440 MEDIUM

CVE-2026-73440: Security Advisory 0178

Vendor Arista Networks
Product EOS
Weakness CWE-212
Published September 16, 2026
Last update September 16, 2026

CVSS base score

4.2/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

On affected platforms running Arista EOS with Simple Network Management Protocol (SNMP) configured, SNMPv3 local or remote user credentials may be exposed as a one-way hashed, localized key value within the device's running and sanitized configurations. An authenticated user who gains access to this sensitive information could leverage it to perform unauthorized read operations on SNMP tables or to send fraudulent trap notifications to the Network Management System (NMS). This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Key dates

02Disclosure timeline

September 16, 2026 CVE published