CVE-2026-106078
MediumCVSS 6.9Summary
An unauthenticated attacker can bypass REST API authentication with a forged federation token and receive responses from REST API endpoints that do not call the Veeam Backup for Microsoft 365 backup service.
Risk Assessment
Authentication bypass may expose API information and enable unauthorized access to management functions.
Recommendation
Apply the vendor patch, restrict network access to the REST API, and monitor for unusual requests with federation tokens.
Other vulnerabilities in Veeam Backup for Microsoft 365
See all- CVE-2026-106077High
A vulnerability allowing a user with the Veeam Backup for Microsoft 365 Administrator role to read arbitrary files on the backup server with LocalSystem privileges.
- CVE-2025-64394Medium
A low-privileged local user can write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.
- CVE-2026-106076Critical
A vulnerability allowing an authenticated organization-transfer peer to inject SQL into the configuration database of the source Veeam Backup for Microsoft 365 server, leading to cross-tenant read and write of configuration data and remote code execution as the PostgreSQL service account.
Original NVD description (English source)
A vulnerability allowing an unauthenticated attacker to bypass REST API authentication with a forged federation token and receive responses from REST API endpoints that do not call the Veeam Backup for Microsoft 365 backup service.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS