🟠 High | Source: Microsoft Security Response Center
A use-after-free vulnerability in Microsoft Windows printer drivers allows a locally authenticated attacker to gain elevated privileges on the affected system. Tracked as CVE-2026-49166, the flaw requires the attacker to already have local access but could enable them to move from a standard user account to higher system-level privileges. This is particularly relevant in shared or multi-user Windows environments, including cloud-hosted virtual machines.
Security Architect’s Take: Prioritise patching this vulnerability on all Windows-based Azure VMs and hybrid endpoints — particularly those running shared printer driver configurations or exposed to multiple users. Enforce least-privilege principles and consider restricting printer driver installation rights via Group Policy to reduce attack surface while patches are deployed.
Original advisory: CVE-2026-49166 Windows Print Configuration Elevation of Privilege Vulnerability