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CVE-2026-21666

CRITICAL CVSS 3.1: 8.8 EPSS 0.35%
Updated Mar 31, 2026
Veeam
Parameter Value
CVSS 8.8 (CRITICAL)
Affected Versions 12.0.0.1402 — 12.3.2.4465
Fixed In 12.3.2.4465
Type CWE-284 (Improper Access Control)
Vendor Veeam
Public PoC No

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

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Veeam Veeam_Backup_\&_Replication
cpe:2.3:a:veeam:veeam_backup_\&_replication:*:*:*:*:*:*:*:*
12.0.0.1402 12.3.2.4465