CVE-2026-21666

critical

Veeam

CVSS v3 Base Score

9.9

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

EPSS Score

0.3%

Exploitation probability in 30 days

Top 47% most likely to be exploited

Attack Characteristics

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Confidentiality

High

Integrity

High

Availability

High

Published: March 12, 2026 (62 days ago)

Last Modified: March 31, 2026

Vendor: Veeam

Source: NVD

Description

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

CWE-284

veeam veeam backup \& replication