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CVE Record

CVE-2026-21302: Substance3D - Modeler | Out-of-bounds Read (CWE-125)

Substance3D - Modeler versions 1.22.4 and earlier are affected by an Out-of-bounds Read vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to disclose sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A malicious file opened in Adobe Substance 3D Modeler could make the application reveal sensitive information from memory. The victim must actively open the file. The issue does not provide documented code execution, data modification, or service disruption, but exposed memory could contain confidential project or session data.

Executive priority

Treat as a normal-priority confidentiality fix, accelerated for creative workstations handling sensitive client assets, credentials, or unreleased designs. It is not an emergency based on supplied evidence, but targeted file-based attacks remain plausible.

Technical view

CVE-2026-21302 is a CWE-125 out-of-bounds read affecting Substance 3D Modeler 1.22.4 and earlier. It requires local delivery and user interaction, needs no privileges, and may cause high confidentiality impact. CVSS 3.1 is 5.5: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Likely exposure

Exposure is limited to systems running Substance 3D Modeler 1.22.4 or earlier, particularly where users open externally supplied or untrusted model files. Systems without this product, or outside the stated affected versions, are not indicated as vulnerable by the supplied sources.

Exploitation context

The supplied record does not identify active exploitation, public exploit availability, or inclusion in CISA KEV. Exploitation requires convincing a user to open a malicious file, reducing broad remote risk but leaving targeted phishing or file-sharing scenarios credible.

Researcher notes

The core condition is an out-of-bounds read triggered during malicious-file processing. The sources establish memory disclosure and required user interaction but provide no affected file format, vulnerable component, proof of concept, attack telemetry, or technical root-cause detail. Avoid assuming code execution from this record.

Mitigation direction

  • Inventory Substance 3D Modeler installations and identify versions 1.22.4 or earlier.
  • Check Adobe advisory APSB26-08 and apply the vendor-recommended update.
  • Restrict opening model files from untrusted or unexpected sources until remediation is complete.
  • Use email and download controls to quarantine suspicious Substance 3D files.

Validation and detection

  • Confirm each installed Substance 3D Modeler version through endpoint inventory or application management records.
  • Verify remediated systems are no longer running version 1.22.4 or earlier.
  • Review Adobe APSB26-08 to confirm the approved fixed version and deployment requirements.
  • Check security telemetry for suspicious files delivered to affected creative workstations.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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cwe · low confidence lookup

CWE-125: Exact CWE lookup

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cve · low confidence lookup

CVE-2026-21302 mapping review

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Vulnerability profileCVE Program record
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:H/I:N/A:N

Official CVE source material

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.

1CVSS vectors
3Timeline events
1ADP providers
2Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N1.83.6adobe

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2026-21302Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
AdobeSubstance3D - Modeler0, 1.22.5unaffected
Weakness

CWE details

CWE-125

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.