Security readout for executives and security teams
Plain-English summary
This flaw affects AnyCubic Chitubox AnyCubic Plugin 1.0.0 and Chitubox Basic V1.8.1 when handling a malicious GF file. A user must open or process the file, but successful exploitation could compromise confidentiality, integrity, and availability on that workstation.
Executive priority
Treat this as a targeted workstation risk for teams handling 3D printer files. Prioritize environments that accept external print jobs or shared design files, because exploitation depends on convincing a user or workflow to process a malicious GF file.
Technical view
CVE-2021-21948 is a CWE-122 heap-based buffer overflow in readDatHeadVec. The CVSS 3.0 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, scoring 7.8. Sources identify a specially crafted GF file as the trigger and do not provide confirmed patch details.
Likely exposure
Exposure is most likely on workstations used for resin 3D printing preparation that have Chitubox Basic V1.8.1 or AnyCubic Plugin 1.0.0 installed and receive GF files from external or untrusted sources.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The attack requires local file handling and user interaction, making phishing, shared design files, or third-party print jobs plausible delivery paths.
Researcher notes
Key evidence is limited to the CVE record and Talos report reference. The sources support affected versions, bug class, trigger file type, and CVSS impact, but not active exploitation or a specific fixed release. Avoid assuming broader Chitubox or AnyCubic product impact.
Mitigation direction
- Identify and reduce use of affected Chitubox and AnyCubic plugin versions.
- Do not open GF files from untrusted or unexpected sources.
- Check AnyCubic, Chitubox, and Talos guidance for confirmed fixed versions.
- Process third-party print files on isolated, low-privilege workstations.
- Apply endpoint controls that inspect or restrict risky file attachments.
Validation and detection
- Inventory systems for Chitubox Basic V1.8.1 and AnyCubic Plugin 1.0.0.
- Confirm whether users receive GF files from customers, vendors, or public repositories.
- Verify untrusted GF files are blocked or handled in an isolated workflow.
- Review endpoint crash telemetry around Chitubox or plugin file parsing.
- Document current vendor remediation status before closing the finding.
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-122: 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 lookupCVE-2021-21948 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
- 7.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/AV:L/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-2021-1376CVE 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.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.