Vulnerability in Cisco License On-Prem

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.1

[ Description ]Official description

A vulnerability in the Cisco Smart Licensing Utility API of Cisco License On-Prem, formerly Cisco Smart Software Manager On-Prem (SSM On-Prem), could allow an unauthenticated, remote attacker to write arbitrary files to the system or cause a DoS condition on an affected application. This vulnerability is due to improper input validation and a lack of authentication in the management API. An attacker could exploit this vulnerability by sending a crafted request to the affected API. A successful exploit could allow the attacker to modify system files or cause a DoS condition.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• NCSC-NL8 Oct 2026NCSC-2026-0407

  Vulnerabilities fixed in Cisco License On-Prem Translated from Dutch

  Probability/damage M/HCVE-2026-20328CVE-2026-76437CVE-2026-76452+5 more CVEs
• CERT-FR8 Oct 2026CERTFR-2026-AVI-1282

  Multiple vulnerabilities in Cisco products Translated from French

  Multiple vulnerabilities have been discovered in Cisco products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-76471CVE-2026-76455CVE-2026-76482+27 more CVEs
• BSI CERT-Bund7 Oct 2026WID-SEC-2026-3798

  Cisco License On-Prem: Multiple vulnerabilities Translated from German

  CVE-2026-76452CVE-2026-76482CVE-2026-20328+5 more CVEs

[ References ]References

• sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ssm-acce…