Security readout for executives and security teams
Plain-English summary
A malicious file opened in Adobe Substance 3D Stager could exploit a memory-handling flaw and run attacker-controlled code with the victim’s permissions. Successful exploitation could compromise data, alter files, or disrupt the workstation. The victim must open the file, so exposure is concentrated around untrusted project files, downloads, and shared assets.
Executive priority
Treat this as a high-priority workstation vulnerability, especially where teams routinely exchange external 3D assets. It is below emergency, internet-exposed risk because exploitation requires a malicious file and user action, with no cited active exploitation. Set a prompt remediation deadline and reinforce safe handling of external project files.
Technical view
CVE-2026-27276 is a use-after-free vulnerability (CWE-416) in Substance 3D Stager 3.1.7 and earlier. It can cause arbitrary code execution as the current user. CVSS 3.1 rates it 7.8: local attack vector, low complexity, no prior privileges, required user interaction, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Workstations running Substance 3D Stager 3.1.7 or earlier are exposed when users open attacker-supplied files. Impact inherits the user’s permissions, increasing risk on privileged or sensitive creative systems. The bundle’s structured affected-version field is ambiguous, so confirm the exact remediation boundary against Adobe’s advisory.
Exploitation context
Exploitation requires convincing a victim to open a malicious file; it is not described as remotely exploitable without user interaction. The source bundle states that this CVE is not in CISA KEV and provides no evidence of active exploitation. Absence from KEV does not prove exploitation is impossible or absent.
Researcher notes
The weakness is memory-lifetime misuse after an object is freed. Successful exploitation may redirect execution within the current user context. Available evidence does not describe the vulnerable file format, exploitation reliability, public proof-of-concept availability, observed campaigns, or specific detection indicators. Avoid assuming those details without further vendor-confirmed evidence.
Mitigation direction
- Follow Adobe’s advisory and update Substance 3D Stager beyond the affected releases.
- Prioritize systems handling externally sourced, emailed, downloaded, or shared project files.
- Restrict untrusted Stager files until affected installations are remediated.
- Avoid routine privileged accounts when using creative applications.
Validation and detection
- Inventory installed Substance 3D Stager versions across managed endpoints.
- Flag installations running version 3.1.7 or earlier for remediation.
- Confirm the fixed-version boundary directly in Adobe’s advisory.
- Verify updates completed successfully and affected versions are no longer present.
- Review endpoint alerts involving Stager and suspicious child processes or file activity.
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-416: 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-2026-27276 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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.