Security readout for executives and security teams
Plain-English summary
A malicious Substance 3D Stager file can corrupt memory and potentially run attacker-controlled code when opened. Successful exploitation could expose or alter data and disrupt the application under the victim’s user privileges. The victim must actively open the crafted file.
Executive priority
Prioritize remediation in the normal high-severity cycle, accelerating systems used to process third-party content. The user-interaction requirement reduces immediate exposure, but successful exploitation can compromise all data and capabilities available to the affected user.
Technical view
CVE-2026-27273 is a local, user-interaction-dependent out-of-bounds write in Adobe Substance 3D Stager. The supplied description identifies versions 3.1.7 and earlier as affected. It carries CVSS 3.1 score 7.8 and may enable arbitrary code execution with high confidentiality, integrity, and availability impact in the current user context.
Likely exposure
Exposure is most likely on endpoints running Substance 3D Stager 3.1.7 or earlier, particularly where users receive project files from external or untrusted sources. The supplied structured version data is ambiguous, so organizations should reconcile installed versions against Adobe APSB26-29.
Exploitation context
Exploitation requires a victim to open a malicious file; no prior application privileges are required. The source bundle marks the CVE as absent from KEV and provides no evidence of active exploitation. Treat unsolicited or externally sourced Stager files as the primary delivery risk.
Researcher notes
The weakness is CWE-787 with vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The narrative says 3.1.7 and earlier are affected, while the structured affected entry contains “0” and “3.1.8” with defaultStatus “unaffected.” Confirm precise range semantics and fixed versions through Adobe’s advisory before final scoping.
Mitigation direction
- Review and apply Adobe’s remediation guidance in APSB26-29.
- Prioritize endpoints running Substance 3D Stager 3.1.7 or earlier.
- Until remediated, prevent users from opening untrusted or unsolicited Stager files.
- Use endpoint protections to inspect files and detect abnormal Stager child-process behavior.
Validation and detection
- Inventory Substance 3D Stager installations and record exact versions.
- Confirm no identified installation remains on version 3.1.7 or earlier after remediation.
- Verify the deployed update matches Adobe APSB26-29 guidance.
- Review endpoint telemetry for suspicious activity following Stager file opens.
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-2026-27273 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.