CVE-2026-21666
Critical
Description
A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.
SeverityCritical
CVSS9.9
Exploit probability—
Product
Veeam Backup \& Replication
PublishedMar 12, 2026
First seenMar 12, 2026
Weakness typeCWE-284Improper access control
How to fix
Update
- veeam veeam_backup_\&_replication12.3.2.4465 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| veeam veeam_backup_\&_replication | 12.0.0.1402 ≤ v < 12.3.2.4465 | 12.3.2.4465 |
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