Home/CVE/A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE)
CVE

CVE-2026-21671

A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE)

A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availability (HA) deployments of Veeam Backup & Replication.

CRITICAL · CVSS 9.1 EPSS 0.00157
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-693Protection Mechanism Failure
CWE-94Improper Control of Generation of Code ('Code Injection')
▤

Affected Products & Versions

1
veeam backup \& replication>= 13.0.0.496 and <= 13.0.1.1071
▣

Scoring & Timeline

9.1
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:H/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/kb4831Vendor Advisory
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