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CVE Record

CVE-2021-32579: Acronis True Image prior to 2021 Update 4 for Windows and Acronis True Image prior to 2021 Update 5 for mac...

Acronis 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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Older Acronis True Image 2021 builds for Windows and macOS allowed tampering with a local micro-service API. The attacker still needed local code execution first, so this is a post-compromise or local foothold risk rather than a standalone remote break-in.

Executive priority

Treat this as a moderate operational hygiene item unless vulnerable Acronis endpoints exist on high-value systems. Prioritize confirming inventory and updating affected backup software because backup tooling often has privileged access and trust relationships.

Technical view

CVE-2021-32579 affects Acronis True Image before 2021 Update 4 on Windows and before 2021 Update 5 on macOS. The CVE describes unauthenticated tampering with the product micro-service API by an attacker with local code execution capability. No CVSS, CWE, or detailed impact is provided in the bundle.

Likely exposure

Exposure is likely limited to endpoints running affected Acronis True Image 2021 versions. The supplied affected-product metadata is incomplete, so inventory should rely on installed product name, OS, and update level.

Exploitation context

The source bundle does not show CISA KEV listing or other evidence of active exploitation. The prerequisite local code execution means exploitation likely depends on an existing endpoint foothold or user-level execution path.

Researcher notes

Key uncertainty is impact depth: the public CVE text names micro-service API tampering but does not provide CWE, CVSS, affected CPEs, or exploit details. Avoid assuming remote exploitability. Focus validation on version state, local execution prerequisite, and vendor advisory alignment.

Mitigation direction

  • Inventory Acronis True Image installations by OS and update level.
  • Update Windows deployments to Acronis True Image 2021 Update 4 or later.
  • Update macOS deployments to Acronis True Image 2021 Update 5 or later.
  • Review Acronis KB guidance for supported upgrade or remediation instructions.
  • Remove unsupported or unnecessary Acronis True Image installations.

Validation and detection

  • Confirm no Windows endpoints run Acronis True Image before 2021 Update 4.
  • Confirm no macOS endpoints run Acronis True Image before 2021 Update 5.
  • Check endpoint inventory and software management records for stale Acronis versions.
  • Verify Acronis KB guidance matches the deployed product and platform.
  • Review endpoint telemetry for suspicious local activity involving Acronis services.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-32579 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.