Missing Authentication for Critical Function in Cisco License On-Prem (formerly Cisco Smart Software Manager) - CVE-2026-76454
Published: October 9, 2026
Vulnerability identifier: #VU154026
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-76454
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to write arbitrary system files or cause a denial of service.
The vulnerability exists due to improper input validation and missing authentication in the Cisco Smart Licensing Utility API of Cisco License On-Prem when handling API requests. A remote attacker can send a crafted request to write arbitrary system files or cause a denial of service.
Affected software
Cisco License On-Prem (formerly Cisco Smart Software Manager)
How to mitigate CVE-2026-76454
Install security update from vendor's website.
Cisco License On-Prem (formerly Cisco Smart Software Manager) - update to 10-202608