SB2026031251 - Multiple vulnerabilities in Veeam Backup & Replication
Published: March 12, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2026-21671)
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote user with the Backup Administrator role can execute arbitrary code in high availability (HA) deployments.
2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2026-21670)
The vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to improperly imposed security restrictions. A remote low-privileged user can extract saved SSH credentials and gain unauthorized access to other systems.
3) Input validation error (CVE-ID: CVE-2026-21669)
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote authenticated domain user can execute arbitrary code on the Backup Server.
4) Input validation error (CVE-ID: CVE-2026-21708)
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote user can execute arbitrary code with privileged of the postgres user.
5) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2026-21672)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improperly imposed security restrictions. A local user can execute arbitrary code with elevated privileges.
6) Protection mechanism failure (CVE-ID: CVE-2026-21668)
The vulnerability allows a remote user to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures. A remote authenticated domain user can bypass restrictions and manipulate arbitrary files on a Backup Repository.
7) Input validation error (CVE-ID: CVE-2026-21667)
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote authenticated domain user can execute arbitrary code on the Backup Server.
8) Input validation error (CVE-ID: CVE-2026-21666)
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote authenticated domain user can execute arbitrary code on the Backup Server.
Remediation
Install update from vendor's website.