CVE-2021-21055
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 · uneditedAdobe Dreamweaver versions 21.0 (and earlier) and 20.2 (and earlier) is affected by an untrusted search path vulnerability that could result in information disclosure. An attacker with physical access to the system could replace certain configuration files and dynamic libraries that Dreamweaver references, potentially resulting in information disclosure.
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 · moderate confidenceAdobe Dreamweaver versions 21.0 and earlier and 20.2 and earlier contain an untrusted search path vulnerability. An attacker with physical access could replace certain configuration files or dynamic link libraries (DLLs) that Dreamweaver loads, causing the application to execute malicious code and potentially disclose sensitive information.
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<= 20.2= 21.0CVSS 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
- Physical
- Complexity
- High
- Privileges
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/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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Identify installed Dreamweaver versionOpen Dreamweaver, go to Help > About Adobe Dreamweaver, or check Programs and Features in Control Panel for the installed version numberAffected if Version is 21.0 or 20.2 or earlier (any version <= 20.2)
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Confirm version is within affected rangeCompare your installed version against the vulnerable versions: 21.0 and any release 20.2 or earlierAffected if Installed version matches 21.0 or any version <= 20.2
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Inspect Dreamweaver program directory for unexpected DLLsNavigate to the Dreamweaver installation folder (typically C:\Program Files\Adobe\Adobe Dreamweaver 2021 or similar) and review all DLL files for unknown or recently modified filesAffected if Unknown DLL files exist or DLLs have been recently modified without your knowledge
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Verify configuration files integrityCheck configuration files in the Dreamweaver directory (such as configuration.xml, default.xml, or any .config files) for unexpected changes or unauthorized modificationsAffected if Configuration files show signs of tampering or unexpected alterations
You are affected if Dreamweaver version 21.0 or version 20.2 or earlier is installed, and the application directory contains any unexpected or tampered DLLs or configuration files.
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.
From vendor dataPrimary mitigation is restricting physical access to affected systems. Users should also ensure Dreamweaver is updated to a patched version once available, and verify that configuration files and DLLs in the application directory have not been tampered with.
- Consultation2.0 h
- Implementation2.0 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 $1,744.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-21055 — 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-2021-21055 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data