# CVE-2026-21271: Dreamweaver Desktop | Improper Input Validation (CWE-20)

> Attackers can execute arbitrary code by tricking users into opening a malicious file in Adobe Dreamweaver Desktop.

- **Severity:** High 8.6 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 Jan 2026
- **Updated:** 27 Aug 2026
- **Also known as:** GHSA-m34w-rgmx-fr6x

## What is CVE-2026-21271?

CVE-2026-21271 is a high-severity code injection vulnerability in Adobe Dreamweaver Desktop, published on 13 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Dreamweaver Desktop versions 21.6 and earlier are affected by an Improper Input Validation vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file and scope is changed.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-21271?

It affects 1 product.


Products: Adobe Dreamweaver.

## How do I fix CVE-2026-21271?

No fix has been published for CVE-2026-21271 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21271 being exploited?

There is no known exploitation of CVE-2026-21271 in the wild and no public exploit code.

## Other vulnerabilities in Adobe Dreamweaver Desktop

- [CVE-2018-4924](https://insights.sbomify.com/CVE-2018-4924/): Command injection in Adobe Dreamweaver CC 18.0 and earlier versions (critical 9.8)
- [CVE-2010-3132](https://insights.sbomify.com/CVE-2010-3132/): Path traversal in n/a (critical 9.3)
- [CVE-2026-47906](https://insights.sbomify.com/CVE-2026-47906/): Dreamweaver Desktop | Dependency on Vulnerable Third-Party Component (CWE-1395) (high 8.6)
- [CVE-2026-47907](https://insights.sbomify.com/CVE-2026-47907/): Dreamweaver Desktop | Improper Access Control (CWE-284) (high 8.6)
- [CVE-2026-21267](https://insights.sbomify.com/CVE-2026-21267/): Command injection in Adobe Dreamweaver Desktop (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21271 and fix it if it is affected.

What it is: CVE-2026-21271 is a high-severity code injection vulnerability in Adobe Dreamweaver Desktop, published on 13 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-21271 in the wild and no public exploit code.

Affected product: Adobe Dreamweaver Desktop. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-21271/ (Markdown: https://insights.sbomify.com/CVE-2026-21271/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21271
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21271
- OSV: https://osv.dev/vulnerability/CVE-2026-21271

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-21271/
Summaries are generated and may contain mistakes; the official description above is the record.