CVE-2026-73440
published 2026-09-16CVE-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…
PriorityP423medium4.2CVSS 3.1
AVNACHPRLUINSUCLILAN
EPSS
0.26%
17.4th percentile
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.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| arista_networks | eos | >= 1.0.0 < 4.33.0F | 4.33.0F |
| arista_networks | eos | 4.33.0F – 4.33.9M | — |
| arista_networks | eos | 4.34.0F – 4.34.7.1M | — |
| arista_networks | eos | 4.35.0F – 4.35.5M | — |
| arista_networks | eos | 4.36.0F – 4.36.1F | — |
CVSS provenance
nvdv3.14.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
nvdv4.02.3LOWCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
Arista EOS up to 4.36.1F SNMP improper authorization (WID-SEC-2026-3287)
vuldb·2026-09-17·CVSS 4.2
CVE-2026-73440 [MEDIUM] Arista EOS up to 4.36.1F SNMP improper authorization (WID-SEC-2026-3287)
A vulnerability was found in Arista EOS up to 4.32.x/4.33.9M/4.34.7.1M/4.35.5M/4.36.1F. It has been declared as critical. This affects an unknown function of the component SNMP. The manipulation results in improper authorization.
This vulnerability is known as CVE-2026-73440. It is possible to launch the attack remotely. No exploit is available.
It is recommended to upgrade the affected component.
GHSA
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
ghsa_unreviewed·2026-09-16
CVE-2026-73440 [LOW] CWE-212 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
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-09-16
Published