LocalSystem code execution via unquoted service path
Published Feb 3, 2026 · Updated Feb 3, 2026
Unquoted service path handling in SyncBreeze Enterprise 12.4.18 allows local users to execute code with LocalSystem privileges. The auto-start Sync Breeze Enterprise service registers C:\Program Files\Sync Breeze Enterprise\bin\syncbrs.exe without quotation marks, so Windows can select an attacker-planted executable from an earlier path segment. A local low-privileged user needs write access to a searched directory, and execution occurs when the service starts, yielding code execution as LocalSystem.
Summary
What happened
Unquoted service path handling in SyncBreeze Enterprise 12.4.18 allows local users to execute code with LocalSystem privileges. The auto-start Sync Breeze Enterprise service registers C:\Program Files\Sync Breeze Enterprise\bin\syncbrs.exe without quotation marks, so Windows can select an attacker-planted executable from an earlier path segment. A local low-privileged user needs write access to a searched directory, and execution occurs when the service starts, yielding code execution as LocalSystem.
The record
- CVE
- CVE-2020-37100
- Published
- Feb 3, 2026
- Updated
- Feb 3, 2026
- Vendor
- Flexense Ltd.
- Product
- SyncBreeze Enterprise
- Classifications
- CWE-428, T1574.009
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 3, 2026CVE publishedPublication date reported by the CVE source.
- Feb 3, 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?
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- Affected versionversion=12.4.18
What conditions does exploitation require?
What is affected?
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
- Sync Breeze Enterprise 12.4.18 - Sync Breeze Enterprise Unquoted Service Pathproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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