What is CVE-2026-21668?

CVE-2026-21668 is a high-severity vulnerability in Veeam Backup And Replication, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-03-12.

How severe is CVE-2026-21668?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Veeam Backup And Replication

CVE-2026-21668

A vulnerability allowing an authenticated domain user to bypass restrictions and manipulate arbitrary files on a Backup Repository.

Vulnerability class: Broken Access Control

EPSS: 0.000 (10.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Veeam Backup And Replication — versions 12.3.2
Veeam Veeam_backup_\&_replication

Weakness classification (CWE)

CWE-862 — Missing Authorization
CWE-693 — Protection Mechanism Failure

References

support@hackerone.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21668?: CVE-2026-21668 is a high-severity vulnerability in Veeam Backup And Replication, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-03-12.
How severe is CVE-2026-21668?: High severity. CVSS v3 base score is 8.8 out of 10.