Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Veeam | Backup for Microsoft 365 | 8.0 – ≤ 8.6.0.1102 | — |
Advisories 1
- WID-SEC-2026-4217 Veeam Backup für Microsoft 365: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 27, 2026