Security readout for executives and security teams
Plain-English summary
PrusaSlicer can be compromised if a user opens a malicious 3MF model file in affected versions. Successful exploitation could let an attacker run code with the user's privileges, putting design workstations and connected files at risk. The attack requires user interaction, but no login is required by the attacker.
Executive priority
Treat this as a high-priority desktop application risk for teams handling external 3D model files. Prioritize inventory, upgrade validation, and safer file-handling controls. Urgency is lower than a wormable server flaw because exploitation requires a user to open a malicious file.
Technical view
CVE-2020-28594 is a CWE-416 use-after-free in Prusa Research PrusaSlicer 2.2.0 and Master commit 4b040b856, in _3MF_Importer::_handle_end_model(). A specially crafted 3MF file can trigger memory corruption leading to code execution. The CVSS 3.0 score is 8.8 with user interaction required.
Likely exposure
Exposure is most likely on workstations that use the affected PrusaSlicer builds and receive 3MF files from customers, vendors, forums, repositories, or email. The source bundle does not identify server-side exposure or other affected products.
Exploitation context
The provided sources describe malicious-file exploitation, not unauthenticated direct compromise. CISA KEV status is false in the bundle, and no cited source here confirms active exploitation in the wild.
Researcher notes
The bundle provides affected versions, vulnerable function, weakness class, CVSS vector, and Talos reference. It does not provide exploit-in-the-wild evidence, a patch version, or vendor mitigation text, so remediation should be verified against PrusaSlicer release guidance.
Mitigation direction
- Identify and retire PrusaSlicer 2.2.0 and Master commit 4b040b856 builds.
- Check PrusaSlicer vendor guidance for fixed versions before approving upgrades.
- Restrict opening 3MF files from untrusted external sources.
- Process external 3MF files on isolated, least-privileged workstations where practical.
- Educate staff that 3MF files can carry code-execution risk in affected builds.
Validation and detection
- Inventory installed PrusaSlicer versions across engineering and printing workstations.
- Confirm whether any systems match version 2.2.0 or commit 4b040b856.
- Review workflows that accept 3MF files from external parties.
- Validate upgraded systems no longer report affected versions.
- Check endpoint telemetry for suspicious activity after opening external 3MF files.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution 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 lookupCVE-2020-28594 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.8HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2020-1218CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.