CVE-2026-21272
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedDreamweaver Desktop versions 21.6 and earlier are affected by an Improper Input Validation vulnerability that could lead to arbitrary file system write. An attacker could leverage this vulnerability to manipulate or inject malicious data into files on the system. Exploitation of this issue requires user interaction in that a victim must open a malicious file and scope is changed.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceDreamweaver Desktop versions 21.6 and earlier contain an improper input validation vulnerability that allows arbitrary file system write. Exploitation requires a victim to open a malicious file, and the CVSS indicates scope is changed, meaning the vulnerability can impact resources beyond the vulnerable component.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 21.7CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Dreamweaver versionOpen Dreamweaver and go to Help > About Adobe Dreamweaver, or check the version in the Creative Cloud desktop app under the Dreamweaver entry. Alternatively, check the installation folder for version metadata.Affected if The installed version is 21.6 or earlier (any version < 21.7).
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Confirm file handling features are in useCheck if the Dreamweaver Files panel or Site root folders are configured. Open Dreamweaver and look at the Files panel (usually bottom-left) to see if any local or remote sites are defined.Affected if Dreamweaver has site definitions or local folders configured, as the vulnerability involves manipulating files opened or managed within Dreamweaver.
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Review recent file activityCheck the Dreamweaver site cache or recent files list. In the application, look at File > Open Recent to see recently accessed files, or check the site cache files in the Dreamweaver site folder (typically in _notes or _sgbak subfolders).Affected if Any .html, .php, or other web files were recently opened, as the attack requires a victim to open a malicious file.
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Inspect file modification timestampsCheck the modification timestamps of web content files in your Dreamweaver local root folders. Use the operating system file explorer or command (ls -la or dir) to compare file dates against expected activity.Affected if Unexpected or unexplained file modifications exist in your Dreamweaver-managed folders, which could indicate exploitation.
A user is affected if Dreamweaver version is 21.6 or earlier and the user opens untrusted files within the application.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped21.7
Update Dreamweaver Desktop to a version newer than 21.6. Avoid opening files from untrusted sources until the patch is applied.
Dreamweaver 21.7
- Open Adobe Creative Cloud desktop application on your system
- Navigate to the Apps section and find Adobe Dreamweaver in your installed apps
- Click on Update next to Dreamweaver to install version 21.7
- Alternatively, visit helpx.adobe.com and download Dreamweaver version 21.7 from the Adobe website
- Restart Dreamweaver after the update completes
- Verify the installed version by going to Help > About Dreamweaver to confirm version 21.7
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,456.
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Free · runs locallyCheck whether your project pulls in CVE-2026-21272 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-21272 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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