# CVE-2016-4271: Security feature bypass in n/a

> Attackers can bypass Flash sandbox restrictions to access sensitive local filesystem data, requiring users to upgrade Adobe Flash Player.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 14 Sep 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-rhff-rv46-hwr9

## What is CVE-2016-4271?

CVE-2016-4271 is a medium-severity vulnerability in Adobe Flash Player, published on 14 Sep 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Adobe Flash Player before 18.0.0.375 and 19.x through 23.x before 23.0.0.162 on Windows and OS X and before 11.2.202.635 on Linux allows attackers to bypass intended access restrictions and obtain sensitive information via unspecified vectors, a different vulnerability than CVE-2016-4277 and CVE-2016-4278, aka a "local-with-filesystem Flash sandbox bypass" issue.

## Which versions are affected by CVE-2016-4271?

It affects 2 products.


Products: Adobe Flash Player, Adobe Flash Player Desktop Runtime.

## How do I fix CVE-2016-4271?

Upgrade to a fixed version.

## Is CVE-2016-4271 being exploited?

There is no known exploitation of CVE-2016-4271 in the wild and no public exploit code.

## Other vulnerabilities in Adobe Flash Player

- [CVE-2017-11292](https://insights.sbomify.com/CVE-2017-11292/): Adobe Flash Player Type Confusion (high 8.8, exploited in the wild)
- [CVE-2016-7892](https://insights.sbomify.com/CVE-2016-7892/): Adobe Flash Player Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2016-7855](https://insights.sbomify.com/CVE-2016-7855/): Adobe Flash Player Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2014-0497](https://insights.sbomify.com/CVE-2014-0497/): Adobe Flash Player Integer Underflow Vulnerablity (high 8.8, exploited in the wild)
- [CVE-2013-0643](https://insights.sbomify.com/CVE-2013-0643/): Adobe Flash Player Incorrect Default Permissions (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-4271 and fix it if it is affected.

What it is: CVE-2016-4271 is a medium-severity vulnerability in Adobe Flash Player, published on 14 Sep 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2016-4271 in the wild and no public exploit code.

Affected product: Adobe Flash Player. 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-2016-4271/ (Markdown: https://insights.sbomify.com/CVE-2016-4271/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-4271
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-4271
- OSV: https://osv.dev/vulnerability/CVE-2016-4271

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-4271/
Summaries are generated and may contain mistakes; the official description above is the record.