SB20260825116 - Missing authentication in Veeam ONE
Published: August 25, 2026
Security Bulletin ID
SB20260825116
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Authentication for Critical Function (CVE-ID: CVE-2026-65641)
CWE-ID: CWE-306 - Missing Authentication for Critical Function
CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to coerce SMB authentication from the service account.
The vulnerability exists due to improper authentication handling in Veeam ONE when handling network requests. A remote attacker can send a specially crafted request to coerce SMB authentication from the service account.
Remediation
Install update from vendor's website.