CVE-2026-76482: Improper Verification of Cryptographic Signature in Cisco Cisco License On-Prem

Cisco License On-Prem suffers from improper verification of cryptographic signatures due to improper input validation, tracked as CVE-2026-76482 and categorized under CWE-347. This vulnerability was discovered during an internal security review and affects numerous specific versions of the product. The flaw allows remote attackers to compromise the system without authentication, resulting in complete loss of confidentiality, integrity, and availability. The CVSS v3.1 base score is 10.0 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H), reflecting a critical remote code execution or similar impact. The vendor has released software hardening updates addressing multiple vulnerabilities, including this one, but no explicit patch links or advisory details are provided in this data.

An unauthenticated remote attacker can exploit this vulnerability to fully compromise the affected Cisco License On-Prem system, gaining complete control over confidentiality, integrity, and availability. This could lead to unauthorized access, data manipulation, and service disruption.

The vendor has conducted an internal security review and released software hardening updates addressing this vulnerability. However, no explicit patch or remediation details are provided in the available data. Users should consult Cisco's official advisories and apply any available updates or mitigations promptly. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.