Security readout for executives and security teams
Plain-English summary
A malicious project file opened in Adobe Substance 3D Stager can corrupt memory and run attacker-controlled code with the victim’s user permissions. This could expose files, alter data, or disrupt the workstation. The victim must open the malicious file, so exposure depends heavily on file-handling practices.
Executive priority
Treat as a high-priority desktop update where Stager is installed. Accelerate remediation for creative teams handling third-party files; routine urgency may be appropriate where the product is absent or tightly isolated.
Technical view
CVE-2026-27274 is a CWE-787 out-of-bounds write in Substance 3D Stager 3.1.7 and earlier. It has CVSS 3.1 score 7.8 and may enable arbitrary code execution as the current user. The vector indicates local delivery, low attack complexity, no privileges required, and required user interaction.
Likely exposure
Workstations running Substance 3D Stager 3.1.7 or earlier are exposed, especially where users open project files received externally or from untrusted repositories. The supplied affected-version metadata is inconsistent, but the narrative explicitly identifies 3.1.7 and earlier.
Exploitation context
Exploitation requires convincing a victim to open a malicious file. The source bundle provides no evidence of active exploitation, and the CVE is not identified as CISA KEV-listed. Absence from KEV does not prove exploitation is not occurring.
Researcher notes
The vulnerability is an out-of-bounds write with potential confidentiality, integrity, and availability impact. Public details supplied here do not identify the vulnerable file parser, root cause, or observed exploitation. The structured affected field appears inconsistent with the narrative version range, so validate scope against Adobe APSB26-29.
Mitigation direction
- Upgrade Substance 3D Stager to version 3.1.8 or later after confirming Adobe’s advisory.
- Prioritize systems whose users regularly receive Substance 3D files from external parties.
- Restrict opening unexpected project files until affected installations are updated.
- Use endpoint controls to limit the impact of code executing under user accounts.
Validation and detection
- Inventory installed Substance 3D Stager versions across managed workstations.
- Confirm no installation remains at version 3.1.7 or earlier.
- Verify the deployed version against Adobe advisory APSB26-29.
- Review endpoint telemetry for suspicious activity following externally sourced Stager 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-787: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27274 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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.
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:H/I:H/A:H1.85.9adobeVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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_stager/apsb26-29.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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.