CVE-2020-27645
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Inventory module of the 1E Client 5.0.0.745 doesn't handle an unquoted path when executing %PROGRAMFILES%\1E\Client\Tachyon.Performance.Metrics.exe. This may allow remote authenticated users and local users to gain elevated privileges.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe Inventory module of 1E Client executes Tachyon.Performance.Metrics.exe using an unquoted path (%PROGRAMFILES%\1E\Client\Tachyon.Performance.Metrics.exe). This allows Windows to interpret spaces in the path, enabling attackers to place malicious executables in intermediate directories (e.g., 1E or Client folders) that would execute with elevated privileges when the service runs.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 5.0.0.745CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Tachyon.Performance.Metrics.exe existsSearch for the file at the default path %PROGRAMFILES%\1E\Client\Tachyon.Performance.Metrics.exe or use: Get-ChildItem -Path $env:PROGRAMFILES -Recurse -Filter 'Tachyon.Performance.Metrics.exe' -ErrorAction SilentlyContinueAffected if The file exists in the 1E Client installation directory
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Confirm 1E Client versionCheck the installed version of 1E Client by inspecting the file properties of Tachyon.Performance.Metrics.exe or using: (Get-Item '%PROGRAMFILES%\1E\Client\Tachyon.Performance.Metrics.exe').VersionInfo.FileVersionAffected if Version equals 5.0.0.745 (or falls within the affected range if additional versions are applicable)
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Identify service or scheduled task running the executableRun: Get-WmiObject win32_service | Where-Object {$_.PathName -like '*Tachyon.Performance.Metrics*'} or check scheduled tasks for entries referencing Tachyon.Performance.Metrics.exeAffected if A Windows service or scheduled task is configured to execute this binary
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Inspect the executable path for unquoted spacesExamine the PathName property of the identified service or the Actions of the scheduled task. Look for a path that contains spaces but is not enclosed in double quotes, such as: C:\Program Files\1E\Client\Tachyon.Performance.Metrics.exe (unquoted) vs "C:\Program Files\1E\Client\Tachyon.Performance.Metrics.exe" (quoted)Affected if The path to Tachyon.Performance.Metrics.exe contains unquoted spaces (e.g., C:\Program Files\1E\Client\)
Your environment is affected if 1E Client version 5.0.0.745 is installed and a Windows service or scheduled task runs Tachyon.Performance.Metrics.exe using an unquoted path that includes spaces.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataAdd double quotes around the executable path in the service or scheduled task configuration that launches Tachyon.Performance.Metrics.exe to prevent path traversal exploitation.
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2020-27645 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-27645 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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