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CVE-2026-21671

Veeam Backup & Replication - Backup Administrator

Veeam CVSS 9.1 Updated April 6, 2026

Executive Risk Summary

"A vulnerability in Veeam Backup & Replication allows an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availability (HA) deployments. This vulnerability poses a significant risk to the security and integrity of the backup infrastructure."

Anticipated Attack Path

  1. 1. Exploitation of the vulnerability by an authenticated user with the Backup Administrator role
  2. 2. Remote code execution on the Veeam Backup & Replication server
  3. 3. Potential lateral movement and further exploitation of the backup infrastructure

Am I Vulnerable?

  • Verify the version of Veeam Backup & Replication and apply the necessary patch
  • Limit access to the Backup Administrator role
  • Monitor the backup infrastructure for suspicious activity

Operational Audit Arsenal

Target Type Service
Target Asset Veeam.Backup.Manager.Service
Standard Path C:\Program Files\Veeam\Backup and Replication\

Manual Verification Required

This is a non-Windows asset (Veeam). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.

Patch Impact Forecast

Reboot Required Likely

Potential disruption to backup and replication services during patch application

Internal Work Notes

Veeam Backup & Replication vulnerability (CVE-2026-21671) - apply patch and restrict Backup Administrator role access

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Related Veeam Threats

Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.