Details USN-8555-1 fixed vulnerabilities in Ubuntu Advantage Tools. On Ubuntu 14.04 LTS only, it was discovered that some machines were unable to enable esm-infra-legacy due to a preemptive apt-helper check. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. (CVE-2026-9494) Frederick Jerusha discovered that Ubuntu Advantage Tools did not properly validate data received from the contract server when writing APT source files. An attacker could possibly use this issue to inject…