CVE-2026-81455 describes a Missing Authentication for Critical Function vulnerability in Dell ThinOS 10. Versions before SecurityAddon_2605.10.2766_T10 do not properly enforce authentication on a critical function, enabling an unauthenticated attacker with remote access to exploit this weakness and gain unauthorized access. The vulnerability has a CVSS v3.1 score of 8.6, indicating high severity, with low attack complexity, no privileges required, and no user interaction needed.

An unauthenticated remote attacker could exploit this vulnerability to gain unauthorized access to critical functions within Dell ThinOS 10, potentially leading to information disclosure (low confidentiality impact), high integrity impact, and low availability impact. This could compromise system integrity and allow malicious actions without proper authentication.

The vulnerability affects versions prior to SecurityAddon_2605.10.2766_T10. Although no explicit patch link is provided, the version SecurityAddon_2605.10.2766_T10 or later is implied to contain the fix. Users should upgrade to SecurityAddon_2605.10.2766_T10 or later to remediate this vulnerability. Patch status is not explicitly confirmed; check Dell's official advisory for the latest remediation guidance.