Security readout for executives and security teams
Plain-English summary
A malicious file can crash Adobe Substance 3D Painter when opened. The issue disrupts the application but is not reported to expose or alter data. Because a user must open the file, risk is concentrated among teams that receive Painter assets from external or untrusted sources.
Executive priority
Prioritize routine remediation for creative teams handling third-party assets. Accelerate deployment where external file exchange is frequent or application availability is operationally important. This is a disruption risk, not a reported data-compromise issue.
Technical view
CVE-2026-21363 is a NULL pointer dereference in Substance 3D Painter 11.1.2 and earlier. CVSS 3.1 scores it 5.5: local attack vector, low complexity, no privileges, required user interaction, unchanged scope, and high availability impact without confidentiality or integrity impact.
Likely exposure
Workstations running Substance 3D Painter 11.1.2 or earlier are potentially exposed, particularly where users open externally supplied files. The supplied evidence does not indicate remote, unattended exploitation or impact beyond the Painter application.
Exploitation context
Exploitation requires a victim to open a malicious file. The source bundle reports no CISA KEV listing and provides no evidence of active exploitation. No exploit maturity or observed campaign information is supplied.
Researcher notes
CWE-476 and the CVSS vector support an application-level denial-of-service assessment. The supplied textual description identifies 11.1.2 and earlier as affected; confirm exact version boundaries and corrected releases through Adobe APSB26-25. No root-cause detail, malicious-file format, patch specifics, or exploitation telemetry is included.
Mitigation direction
- Review Adobe advisory APSB26-25 for the supported corrected release and deployment guidance.
- Update affected Painter installations to a vendor-confirmed version outside the affected range.
- Restrict or scrutinize Painter files received from untrusted or unexpected sources.
- Use endpoint controls and user guidance to reduce opening of suspicious files.
Validation and detection
- Inventory Substance 3D Painter versions across managed workstations.
- Identify installations running version 11.1.2 or earlier.
- Confirm remediated endpoints run a version Adobe identifies as unaffected.
- Review application crash telemetry for unexpected Painter failures involving externally sourced 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-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-2026-21363 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_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.