What is CVE-2026-21708?

CVE-2026-21708 is a critical-severity vulnerability in Veeam Backup And Replication, classified under SQL Injection. CVSS score: 9.9/10. Published 2026-03-12.

How severe is CVE-2026-21708?

Critical severity. CVSS v3 base score is 9.9 out of 10.

SQL Injection in Veeam Backup And Replication

CVE-2026-21708

A vulnerability allowing a Backup Viewer to perform remote code execution (RCE) as the postgres user.

Vulnerability class: SQL Injection

Published 2026-03-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.011 (66.2th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000

Affected products

Veeam Backup And Replication — versions 12, 13
Veeam Backup \& Replication

Weakness classification (CWE)

CWE-89 — SQL Injection

References

www.veeam.com/kb4831 (Vendor Advisory)
www.veeam.com/kb4830 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21708?: CVE-2026-21708 is a critical-severity vulnerability in Veeam Backup And Replication, classified under SQL Injection. CVSS score: 9.9/10. Published 2026-03-12.
How severe is CVE-2026-21708?: Critical severity. CVSS v3 base score is 9.9 out of 10.