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Command InjectionWeakness · CWE-77

CVE-2025-57521

MEDIUM · 6.1 CVSS v3.1 Published 2025-10-21
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
63/100
Remediation priority · Elevated
Zero-click

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 · unedited
Bambu Studio 2.1.1.52 and earlier is affected by a vulnerability that allows arbitrary code execution during application startup. The application loads a network plugin without validating its digital signature or verifying its authenticity. A local attacker can exploit this behavior by placing a malicious component in the expected location, which is controllable by the attacker (e.g., under %APPDATA%), resulting in code execution within the context of the user. The main application is digitally signed, which may allow a malicious component to inherit trust and evade detection by security solutions that rely on signed parent processes.

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 confidence

Bambu Studio 2.1.1.52 and earlier loads network plugins from user-controllable locations (%APPDATA%) without validating digital signatures or authenticity. A local attacker can place a malicious plugin in the expected location that gets loaded during startup with the signed parent application's trust, achieving arbitrary code execution in user context.

MitigationUpdate to a patched version of Bambu Studio beyond 2.1.1.52 that implements proper plugin signature validation. Until then, monitor %APPDATA% for unexpected plugin files and implement application whitelisting controls.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS 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
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

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 checks

Work through these to decide whether this CVE applies to you.

  1. Locate Bambu Studio installation and version
    Search for Bambu Studio in Program Files or use 'Get-ItemProperty' in PowerShell: Get-ChildItem -Path 'C:\Program Files','C:\Program Files (x86)' -Recurse -Filter 'BambuStudio.exe' -ErrorAction SilentlyContinue | Select-Object FullName, @{N='Version';E={(Get-Item $_.FullName).VersionInfo.FileVersion}}
    Affected if The installed version is 2.1.1.52 or earlier (verify against Bambu Studio's official version release notes)
  2. Identify the plugin storage location in %APPDATA%
    Open Windows Explorer or use command prompt to navigate to %APPDATA%\BambuStudio\ and look for subdirectories such as 'plugins', 'addon', or 'network_plugin'
    Affected if The %APPDATA%\BambuStudio\ directory contains plugin subdirectories writable by standard users
  3. Enumerate plugin files in the plugin directory
    Use PowerShell: Get-ChildItem -Path "$env:APPDATA\BambuStudio" -Recurse -Include *.dll,*.so,*.dylib,*.plugin -ErrorAction SilentlyContinue | Select-Object FullName, LastWriteTime
    Affected if Any plugin files exist in user-writable locations under %APPDATA%\BambuStudio\
  4. Verify plugin signature validation capability
    Review Bambu Studio settings or configuration files (look in %APPDATA%\BambuStudio\config or similar) for plugin signing, verification, or validation settings
    Affected if There is no option enabled to validate digital signatures on plugins before loading them, or signature validation is disabled
  5. Check for unexpected network plugin behavior
    Monitor %APPDATA%\BambuStudio\ for newly created plugin files during or after application startup, or review application logs if available for plugin load events
    Affected if Plugins are automatically loaded from %APPDATA% locations without user confirmation or signature verification

A user is affected if they are running Bambu Studio version 2.1.1.52 or earlier and the application loads plugin files from user-writable %APPDATA% directories without validating digital signatures.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update to a patched version of Bambu Studio beyond 2.1.1.52 that implements proper plugin signature validation. Until then, monitor %APPDATA% for unexpected plugin files and implement application whitelisting controls.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA3.0 h
23.0 hours of engineering $4,000
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-57521 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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