Security readout for executives and security teams
Plain-English summary
A malicious file can crash Adobe Substance 3D Modeler when a user opens it. The issue threatens application availability, but the supplied sources do not indicate data theft, data modification, or system compromise.
Executive priority
Schedule remediation through normal vulnerability-management timelines, prioritizing creative teams that exchange files externally. Escalate if repeated unexplained crashes or targeted malicious-file delivery is observed.
Technical view
CVE-2026-21301 is a NULL pointer dereference in Substance 3D Modeler 1.22.4 and earlier. It requires local delivery and user interaction, needs no privileges, and can cause high availability impact. CVSS 3.1 rates it 5.5.
Likely exposure
Exposure is most likely where Substance 3D Modeler 1.22.4 or earlier is installed and users may open untrusted or externally supplied files. Systems without the product are not exposed.
Exploitation context
The victim must open a malicious file. The CVE is not listed as KEV in the supplied bundle, and no cited evidence establishes active exploitation. Treat unexpected model files as potentially unsafe.
Researcher notes
The documented weakness is CWE-476 and the stated outcome is application denial-of-service. The structured version data references 1.22.5 while the description says 1.22.4 and earlier; confirm the precise fixed-version boundary in Adobe's advisory. No confidentiality or integrity impact is claimed.
Mitigation direction
- Check Adobe's advisory for the supported fixed release and update affected installations promptly.
- Discourage users from opening unexpected Substance 3D files from untrusted sources.
- Use email and file-transfer controls to quarantine suspicious model files pending review.
Validation and detection
- Inventory installed Substance 3D Modeler versions and identify releases 1.22.4 or earlier.
- Confirm updated endpoints report a version outside the stated affected range.
- Review application crash telemetry associated with externally received model files.
- Verify software deployment controls prevent affected versions from being reinstalled.
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-476: 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-2026-21301 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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.
SSVC decision data
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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H1.83.6adobeVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/substance3d-modeler/apsb26-08.htmlCVE reference, adobe · vendor-advisory
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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.