Medium severity · published Sep 16, 2026
CVE-2026-73440
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 with
4.2
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
EOS · Arista Networks
4.36.0F through 4.36.1F; 4.35.0F through 4.35.5M; 4.34.0F through 4.34.7.1M; 4.33.0F through 4.33.9M; 1.0.0 before 4.33.0F · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73440
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-73440
www.arista.com
https://www.arista.com/en/support/advisories-notices/security-advisory/24734-security-advisory-0178
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