CVE-2026-76454 Cisco License On-Prem - Unrestricted File Upload & Denial of Service

Cisco License On-Prem contains an unrestricted file write and denial of service vulnerability caused by improper input validation and lack of authentication in the Smart Licensing Utility API, letting unauthenticated remote attackers write arbitrary files or cause DoS, exploit requires no authentication.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.58% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Unrestricted File Upload
Impact
File System Write, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
7 October 2026
Updated
15 October 2026
Weakness
CWE-23

Vendor fix

Update to the latest available version with the vulnerability fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs