A command injection vulnerability in Microsoft Copilot allows an unauthenticated attacker to tamper with the service over a network, without requiring any user interaction or elevated privileges. The flaw stems from improper handling of special characters within commands, a class of vulnerability that can enable attackers to manipulate application behaviour or underlying systems. Given Copilot’s integration across Microsoft 365 and Azure services, the potential blast radius for affected organisations is significant.

Security Architect’s Take: Review your organisation’s exposure to Microsoft Copilot endpoints and ensure network-level controls restrict access to trusted users only; monitor Microsoft’s remediation guidance closely and apply any available patches or mitigations immediately, particularly if Copilot is integrated with sensitive data sources or enterprise workflows.

Original advisory: CVE-2026-42895 Microsoft Copilot Tampering Vulnerability

A vulnerability in Microsoft Azure Synapse Analytics allows an authenticated attacker to elevate their privileges over a network by exploiting unnecessarily broad execution permissions within the service. This means a user with standard access could potentially gain higher-level control than intended, putting sensitive data workloads and analytics environments at risk. The attack requires no physical access and can be carried out remotely, increasing its practical threat level.

Security Architect’s Take: Review and restrict role assignments within Azure Synapse workspaces immediately, applying least-privilege principles to all identities — managed identities, service principals, and user accounts alike. Monitor Microsoft’s patch guidance and apply any available fixes promptly; in the interim, audit network access controls to limit who can interact with Synapse endpoints.

Original advisory: CVE-2026-48584 Microsoft Azure Synapse Elevation of Privilege Vulnerability