CVE-2026-73440 Security Advisory 0178
Authenticated users can expose SNMPv3 credentials from configurations, enabling unauthorized SNMP table reads and fraudulent trap notifications on Arista EOS devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73440?
CVE-2026-73440 is a low-severity vulnerability in Arista Networks EOS, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-212
Which versions are affected by CVE-2026-73440?
How do I fix CVE-2026-73440?
No fix has been published for CVE-2026-73440 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-73440 being exploited?
There is no known exploitation of CVE-2026-73440 in the wild and no public exploit code.
Sources
Also known as GHSA-jr73-xp57-w3rh.