#VU123974 Input validation error in Backup & Replication - CVE-2026-21671

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Main Vulnerability Database Vulnerabilities #VU123974

#VU123974 Input validation error in Backup & Replication - CVE-2026-21671

Published: March 12, 2026


Vulnerability identifier: #VU123974
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-21671
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Backup & Replication
Software vendor:
Veeam

Description

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.


Remediation

Install updates from vendor's website.

External links