Critical HP Easy Start Vulnerabilities on macOS Exposed

Three significant vulnerabilities in HP Easy Start for macOS have been identified, posing a risk of privilege escalation for attackers. These security issues, affecting versions prior to 2.16.7.260722, could disrupt printer software installations, prompting HP to issue an updated version to mitigate these threats.

Identifying the Vulnerabilities

The flaws are cataloged as CVE-2026-12554, CVE-2026-12555, and CVE-2026-12556, impacting the application’s download, file handling, and network settings. HP Easy Start’s vulnerability to privileged installation operations makes it susceptible to unauthorized file and package manipulations.

Among these, CVE-2026-12554 is notably severe, rated at 8.5 on the CVSS 4.0 scale. This flaw stems from the use of outdated third-party components, specifically the OSPFTP download stack, which inadequately secures data transfers via fallback FTP schemes.

Potential Risks and Exploitation

The outdated FTP component broadens the attack surface, enabling network-positioned attackers or those capable of manipulating DNS resolutions to interfere with software downloads. Although not every installation defaults to FTP, the outdated component poses substantial risks.

CVE-2026-12555, classified under CWE-379, scores 7.7 and relates to insecure temporary file handling by the HP Uninstaller component. The predictable file paths under temporary directories could be exploited by local attackers to redirect application log data, resulting in file modification or corruption.

Network Security Concerns

The third vulnerability, CVE-2026-12556, is associated with CWE-319 and also scores 7.7. It involves the relaxed App Transport Security settings, allowing insecure HTTP connections. This, combined with the FTP fallback, increases the risk of cleartext data transmission, making it an attractive target for attackers.

Security expert Nir Yehoshua from Cipher Security Labs highlighted these vulnerabilities during an assessment of HP Easy Start version 2.16.0. The vulnerabilities have since been addressed in version 2.16.7.260722, which enhances transport security and removes problematic components.

Call to Action

HP advises all macOS users and organizations to update HP Easy Start to the latest version to close these security gaps. Administrators should also check for older versions on shared systems and review network configurations to prevent potential exploits.

Ensuring up-to-date software and robust network security measures is essential for safeguarding against these vulnerabilities and maintaining data integrity.