SMB Authentication Coercion Vulnerability in Veeam Software
CVE-2026-65641

9.3CRITICAL

Key Information:

Vendor

Veeam
Status
One
Vendor
CVE Published:
26 August 2026

What is CVE-2026-65641?

A vulnerability exists in Veeam Backup & Replication that allows unauthenticated network attackers to manipulate SMB authentication processes from the service account. This flaw could lead to unauthorized access attempts by leveraging the SMB protocol, potentially impacting data integrity and security. Users are advised to review their configurations and apply the necessary patches to mitigate risks associated with this vulnerability.

Affected Version(s)

One 0 < 13.1

One 0 < 13.0.2

References

https://www.veeam.com/kb4905

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.