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CVE-2026-21671

Published: Mar 12, 2026Updated: May 10, 2026 Sources: CVE List NVD BDUCWE-94
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
1.3%
Top 32.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-94CWE-693

Affected Products

Software ApplianceVeeam
On-prem
Cloud & SaaS / virtualization
Veeam Backup & ReplicationVeeam Software AG
On-prem
Cloud & SaaS / virtualization
veeam backup \& replicationveeam
SaaSSaaS Service
Cloud & SaaS
veeamcommercialCloud & SaaS
veeam software agcommercialCHCloud & SaaSaka veeam backup & replication, veeam one, veeam service provider console (vspc)

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://www.veeam.com/kb4831
veeam.com

Timeline

Published
Mar 12, 2026
Last Updated
May 10, 2026

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