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

CVE-2026-21667

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

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

CRITICAL · CVSS 9.9 EPSS 0.00403
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-284Improper Access Control
▤

Affected Products & Versions

1
veeam backup \& replication>= 12.0.0.1402 and < 12.3.2.4465
▣

Scoring & Timeline

9.9
CRITICAL · CVSS v3.1 · support@hackerone.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Mar 2026 · 03:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.veeam.com/kb4830Vendor Advisory
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