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CVE-2026-21667

critical

Description

A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.

References

https://www.bleepingcomputer.com/news/security/veeam-warns-of-critical-flaws-exposing-backup-servers-to-rce-attacks/

https://www.veeam.com/kb4830

Details

Source: Mitre, NVD

Published: 2026-03-12

Updated: 2026-03-12

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 9.9

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity: Critical

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability Being Monitored