This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. Following the system upgrade, users are required to execute the syntax conversion command specified below to adopt the updated, encrypted SNMPv3 CLI format: switch# configure convert new-syntax The updated encrypted SNMPv3 CLI configuration follows this structure, incorporating the newly introduced "key <algo> <encrypted_text>" syntax: switch# show running-config | grep snmp-server snmp-server user alice group_alice v3 localized f5717f2cdde9bb946d00 auth sha256 key 7 005D110205085E520B754E1B591C504542585F557D2F217064607A10034752035500080755575640440F5C00505053515F08525208035C1605525E0A040E781F4D CVE-2026-73440 has been fixed in the following releases: - 4.36.2F and later releases in the 4.36.x train - 4.35.6M and later releases in the 4.35.x train - 4.34.8M and later releases in the 4.34.x train - 4.33.10M and later releases in the 4.33.x train No hotfix is available for this issue.
Workaround
No mitigation exists.
Wed, 16 Sep 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Wed, 16 Sep 2026 10:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Security Advisory 0178 | |
| Weaknesses | CWE-212 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: Arista
Published:
Updated: 2026-09-16T13:40:25.872Z
Reserved: 2026-08-12T16:39:35.977Z
Link: CVE-2026-73440
Updated: 2026-09-16T13:40:19.575Z
Status : Received
Published: 2026-09-16T10:16:51.870
Modified: 2026-09-16T14:17:08.470
Link: CVE-2026-73440
No data.
OpenCVE Enrichment
No data.