Bottom line: Unauthenticated remote attackers can escalate privileges via Microsoft 365 Copilot.
A vulnerability in Microsoft 365 Copilot allows attackers to elevate their privileges. The vulnerability can be exploited by attackers without authentication from a remote location.
A vulnerability in Microsoft 365 Copilot enables privilege escalation through remote exploitation without prior authentication. The Federal Office for Information Security (Bundesamt für Sicherheit in der Informationstechnik, BSI) points to the risk in its Security Advisory WID-SEC-2026-2185.
For CISOs, this means that attackers could gain access to privileged functions in the Microsoft 365 environment and thus significantly expand their capabilities to spread within the network. This particularly affects environments where Copilot is used for enterprise data and business processes.
Organizations should promptly review Microsoft security recommendations to address this vulnerability and apply appropriate patches. If necessary, access to Microsoft 365 Copilot should be restricted until a fix is available.
Source: wid.cert-bund.de · Published 3 July 2026
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