Service-account credential exposure via coerced SMB authentication
Published Aug 26, 2026 · Updated Aug 27, 2026
Forced SMB authentication in Veeam ONE 13 through 13.1.0.7034 allows remote attackers to expose service-account authentication material. An attacker-controlled network request causes the service account to initiate SMB authentication, but Veeam has not disclosed the affected component or request field. No authentication or user interaction is required, and captured NTLM material can expose the service account; the public code path remains undisclosed.
Summary
What happened
Forced SMB authentication in Veeam ONE 13 through 13.1.0.7034 allows remote attackers to expose service-account authentication material. An attacker-controlled network request causes the service account to initiate SMB authentication, but Veeam has not disclosed the affected component or request field. No authentication or user interaction is required, and captured NTLM material can expose the service account; the public code path remains undisclosed.
The record
- CVE
- CVE-2026-65641
- Published
- Aug 26, 2026
- Updated
- Aug 27, 2026
- Vendor
- Veeam Software
- Product
- Veeam ONE
- Classifications
- CWE-288, T1187
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 26, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <13.0.2
- Affected versionversion=0 <13.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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