CVE-2021-32579
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 · uneditedAcronis True Image prior to 2021 Update 4 for Windows and Acronis True Image prior to 2021 Update 5 for macOS allowed an unauthenticated attacker (who has a local code execution ability) to tamper with the micro-service API.
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 · moderate confidenceAcronis True Image prior to the specified updates contains a vulnerability that allows an attacker with existing local code execution ability to tamper with the application's micro-service API, potentially enabling privilege escalation or further compromise of the backup system's functionality.
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= 2021CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/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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Identify installed Acronis True Image versionOpen Windows Control Panel > Programs and Features, or on macOS open Applications folder. Locate Acronis True Image and note the version number displayed.Affected if The version shown is 2021 (any build) and does not indicate Update 4 or later (Windows) or Update 5 or later (macOS)
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Verify exact build number via application UILaunch Acronis True Image, then go to Help > About or the application's main menu to view the detailed build/version information including update level.Affected if The build shows only '2021' without Update 4 (Windows) or Update 5 (macOS) explicitly stated, or shows an earlier update number
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Confirm micro-service components are presentCheck for Acronis micro-service related processes or services running on the system using Task Manager (Windows) or Activity Monitor (macOS), looking for processes with 'acronis' in the name related to API or service functionality.Affected if Acronis True Image 2021 is installed with micro-service components actively running on the system
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Inspect application installation directoryNavigate to the default installation path (typically C:\Program Files\Acronis\True Image on Windows or /Applications/Acronis True Image on macOS) and verify the executable version properties.Affected if The executable version property shows a 2021 build prior to the fixed update levels
You are affected if Acronis True Image 2021 is installed and the version is earlier than Update 4 (Windows) or Update 5 (macOS), with micro-service components present on the system.
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 dataUpgrade Acronis True Image to version 2021 Update 4 or later for Windows, or version 2021 Update 5 or later for macOS, to remediate the micro-service API tampering vulnerability.
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-32579 — 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-2021-32579 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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