Security readout for executives and security teams
Plain-English summary
A malicious file can crash Adobe Substance 3D Painter when a user opens it. The issue threatens availability, not confidentiality or data integrity. Organizations using affected Painter releases could experience interrupted creative workflows and lost unsaved work, but the supplied sources do not report active exploitation.
Executive priority
Schedule prompt remediation through normal endpoint maintenance, prioritizing teams that frequently exchange external creative assets. Emergency response is not supported by the supplied evidence, but repeated crashes could disrupt production deadlines and cause lost work.
Technical view
CVE-2026-21364 is a NULL pointer dereference in Substance 3D Painter 11.1.2 and earlier. Exploitation is local, requires no privileges, and depends on user interaction with a malicious file. CVSS 3.1 scores it 5.5: high availability impact with no stated confidentiality or integrity impact.
Likely exposure
Exposure is limited to endpoints running Substance 3D Painter 11.1.2 or earlier, particularly where users receive project files from external or untrusted sources. Internet exposure alone is not sufficient; a user must open a malicious file.
Exploitation context
The supplied record describes user-assisted denial of service through a malicious file. It provides no evidence of code execution, data theft, privilege escalation, or active exploitation. The CVE is not identified as KEV in the supplied bundle.
Researcher notes
CWE-476 and the CVSS vector indicate an availability-only failure: AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The narrative explicitly marks 11.1.2 and earlier as affected. The structured version entry references 11.1.3, but the bundle does not explicitly label it as the fixed release; confirm with Adobe.
Mitigation direction
- Identify and prioritize Painter installations running version 11.1.2 or earlier.
- Consult Adobe advisory APSB26-25 for the vendor-approved corrected release and deployment guidance.
- Upgrade affected installations according to Adobe guidance.
- Restrict or scrutinize Painter files received from unknown or external sources.
- Encourage users to save work before opening externally supplied files.
Validation and detection
- Inventory installed Substance 3D Painter versions across managed endpoints.
- Confirm upgraded installations are outside the explicitly affected range.
- Verify software-management reports show no remaining versions 11.1.2 or earlier.
- Review application crash telemetry for unusual Painter failures associated with externally sourced files.
- Confirm controls appropriately flag or isolate untrusted Painter files.
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-2026-21364 mapping review
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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_painter/apsb26-25.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.