# CVE-2021-40719: Adobe Connect Deserialization of Untrusted Data Remote Code Execution

> An attacker can achieve remote code execution on Adobe Connect servers by exploiting a deserialization vulnerability in AMF message processing.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Oct 2021
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-rj2h-5w53-cg32

## What is CVE-2021-40719?

CVE-2021-40719 is a critical unsafe deserialization vulnerability in Adobe Connect, published on 21 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Adobe Connect version 11.2.3 (and earlier) is affected by a Deserialization of Untrusted Data vulnerability to achieve arbitrary method invocation when AMF messages are deserialized on an Adobe Connect server. An attacker can leverage this to execute remote code execution on the server.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2021-40719?

It affects 1 product.


Products: Adobe Connect.

## How do I fix CVE-2021-40719?

No fix has been published for CVE-2021-40719 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40719 being exploited?

There is no known exploitation of CVE-2021-40719 in the wild and no public exploit code.

## Other vulnerabilities in Adobe Connect

- [CVE-2017-11291](https://insights.sbomify.com/CVE-2017-11291/): Server-side request forgery in Adobe Connect 9.6.2 and earlier versions (critical 10.0)
- [CVE-2026-75682](https://insights.sbomify.com/CVE-2026-75682/): Adobe Connect | Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (CWE-89) (critical 9.9)
- [CVE-2023-4661](https://insights.sbomify.com/CVE-2023-4661/): SQLi in Saphira Connect (critical 9.8)
- [CVE-2023-4662](https://insights.sbomify.com/CVE-2023-4662/): RCE in Saphira Connect (critical 9.8)
- [CVE-2018-12804](https://insights.sbomify.com/CVE-2018-12804/): Auth bypass in Adobe Connect 9.7.5 and earlier (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40719 and fix it if it is affected.

What it is: CVE-2021-40719 is a critical unsafe deserialization vulnerability in Adobe Connect, published on 21 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-40719 in the wild and no public exploit code.

Affected product: Adobe Connect. 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-2021-40719/ (Markdown: https://insights.sbomify.com/CVE-2021-40719/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40719
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40719
- OSV: https://osv.dev/vulnerability/CVE-2021-40719

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40719/
Summaries are generated and may contain mistakes; the official description above is the record.