CVE-2026-20160: Cisco Smart Software Manager On-Prem

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

A vulnerability in Cisco Smart Software Manager On-Prem (SSM On-Prem) could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected SSM On-Prem host. This vulnerability is due to the unintentional exposure of an internal service. An attacker could exploit this vulnerability by sending a crafted request to the API of the exposed service. A successful exploit could allow the attacker to execute commands on the underlying operating system with root-level privileges.

Affected products

• Cisco Smart Software Manager On-Prem: from 9-202502, before 9-202601 (fixed in 9-202601)

Published 2026-04-01. Last modified 2026-07-01.