Security readout for executives and security teams
Plain-English summary
A malicious file opened in Adobe Dreamweaver Desktop can bypass authorization controls and run unauthorized code with the victim’s account permissions. Successful exploitation could expose or alter data and disrupt the workstation. The supplied evidence rates the issue high severity, but does not establish active exploitation.
Executive priority
Treat this as a high-priority workstation remediation, especially for developers, administrators, and publishing teams. The required user action reduces immediacy compared with interaction-free remote compromise, but arbitrary code execution can still cause substantial data and operational impact. Establish ownership, inventory affected installations, and apply Adobe-confirmed remediation promptly.
Technical view
CVE-2026-21274 is a CWE-863 incorrect-authorization flaw affecting Dreamweaver Desktop 21.6 and earlier. It enables arbitrary code execution as the current user after the victim opens a malicious file. CVSS 3.1 is 7.8: local access, low complexity, no privileges, required user interaction, unchanged scope, and high confidentiality, integrity, and availability impacts.
Likely exposure
Organizations are exposed where Dreamweaver Desktop 21.6 or earlier remains installed and users can open files from untrusted or compromised sources. Risk increases for privileged users and workstations handling sensitive source code, credentials, or production publishing access. Server-side exposure is not established by the supplied sources.
Exploitation context
Exploitation requires a victim to open a malicious file; it is not described as remotely exploitable without interaction. The source bundle marks the CVE as absent from KEV and provides no other evidence of active exploitation. That absence should not be interpreted as proof exploitation has never occurred.
Researcher notes
The supplied material identifies the authorization weakness and execution impact but does not explain the vulnerable component, malicious-file format, authorization boundary, indicators, or root cause. It also does not provide evidence of exploitation in the wild. Avoid inferring attack mechanics beyond local execution following user-assisted file opening.
Mitigation direction
- Inventory Dreamweaver installations and identify systems running version 21.6 or earlier.
- Consult Adobe’s advisory and deploy its confirmed corrected release or prescribed remediation.
- Restrict opening Dreamweaver files received unexpectedly or from untrusted sources.
- Prioritize remediation on privileged workstations and systems with publishing or sensitive-code access.
- Use endpoint controls to limit unauthorized child processes and code execution where operationally appropriate.
Validation and detection
- Confirm installed Dreamweaver versions through software inventory and direct endpoint checks.
- Verify remediated systems no longer run version 21.6 or earlier.
- Review Adobe’s advisory to confirm the installed release addresses CVE-2026-21274.
- Check endpoint telemetry for suspicious execution associated with Dreamweaver or recently opened untrusted files.
- Confirm user-facing controls and guidance cover unexpected Dreamweaver-compatible 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-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-21274 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/dreamweaver/apsb26-01.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.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.