Windows Remote Assistance Vulnerability Allow attacker To bypass Security Features

Microsoft disclosed CVE-2026-20824, a Windows Remote Assistance protection-mechanism bypass that can allow specially crafted files to evade Mark of the Web (MOTW) defenses and be treated as trusted local content; the flaw is local, requires no privileges but needs user interaction (UI:R), has CVSS 5.5 with high confidentiality impact, affects many supported Windows client and server builds, and was fixed in the January 13, 2026 Patch Tuesday updates—administrators are urged to apply updates and tighten filtering and Remote Assistance use until patched.