Administrator bypass of Driver Signature Enforcement
Published Apr 17, 2026 · Updated Apr 17, 2026
Command injection in affected Veeam backup products allows local administrators to bypass Windows Driver Signature Enforcement. Veeam has not published the vulnerable component, the command construction path, or the untrusted input that reaches it. Exploitation requires local administrator privileges and defeats the Windows control that blocks unsigned drivers, exposing the host to unauthorized kernel-level code.
Summary
What happened
Command injection in affected Veeam backup products allows local administrators to bypass Windows Driver Signature Enforcement. Veeam has not published the vulnerable component, the command construction path, or the untrusted input that reaches it. Exploitation requires local administrator privileges and defeats the Windows control that blocks unsigned drivers, exposing the host to unauthorized kernel-level code.
The record
- CVE
- CVE-2026-21709
- Published
- Apr 17, 2026
- Updated
- Apr 17, 2026
- Vendor
- Veeam Software
- Product
- Veeam Backup & Replication
- Classifications
- CWE-77, T1562.001
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Apr 17, 2026CVE publishedPublication date reported by the CVE source.
- Apr 17, 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=12 <12.3.2
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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