What is CVE-2026-21709?

CVE-2026-21709 is a medium-severity vulnerability in Veeam Backup And Replication, classified under Command Injection. CVSS score: 6.7/10. Published 2026-04-17.

How severe is CVE-2026-21709?

Medium severity. CVSS v3 base score is 6.7 out of 10.

RCE in Veeam Backup And Replication

CVE-2026-21709

A vulnerability allowing a local attacker with administrator privileges to bypass Windows Driver Signature Enforcement.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.002 (6.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Veeam Backup And Replication — versions 12
Veeam Software Appliance — versions 13

Weakness classification (CWE)

CWE-77 — Command Injection

References

support@hackerone.com
support@hackerone.com

Frequently asked questions

What is CVE-2026-21709?: CVE-2026-21709 is a medium-severity vulnerability in Veeam Backup And Replication, classified under Command Injection. CVSS score: 6.7/10. Published 2026-04-17.
How severe is CVE-2026-21709?: Medium severity. CVSS v3 base score is 6.7 out of 10.