# CVE-2022-23277: Microsoft Exchange Server Remote Code Execution Vulnerability

> Attackers can execute arbitrary code on Microsoft Exchange Server, requiring immediate patching by administrators.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Mar 2022
- **Updated:** 8 Jul 2025
- **Also known as:** GHSA-364v-6m73-qv4g

## What is CVE-2022-23277?

CVE-2022-23277 is a high-severity code injection vulnerability in Microsoft Exchange Server, published on 9 Mar 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Microsoft Exchange Server Remote Code Execution Vulnerability

## Which versions are affected by CVE-2022-23277?

It affects 1 product.


Products: Microsoft Exchange Server.

## How do I fix CVE-2022-23277?

No fix has been published for CVE-2022-23277 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-23277 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-23277 exists.

Public exploit code:

- CVE-2022-23277 POC to write a webshell to aspnet_client (github_poc): https://github.com/7BitsTeam/CVE-2022-23277
- Microsoft Exchange Server ChainedSerializationBinder RCE (metasploit)

## Other vulnerabilities in Microsoft Exchange Server

- [CVE-2024-21410](https://insights.sbomify.com/CVE-2024-21410/): Microsoft Exchange Server Privilege Escalation (critical 9.8, exploited in the wild)
- [CVE-2021-34473](https://insights.sbomify.com/CVE-2021-34473/): Microsoft Exchange Server Remote Code Execution (critical 9.1, exploited in the wild)
- [CVE-2021-26855](https://insights.sbomify.com/CVE-2021-26855/): Microsoft Exchange Server Remote Code Execution (critical 9.1, exploited in the wild)
- [CVE-2021-34523](https://insights.sbomify.com/CVE-2021-34523/): Microsoft Exchange Server Privilege Escalation (critical 9.0, exploited in the wild)
- [CVE-2023-21529](https://insights.sbomify.com/CVE-2023-21529/): Microsoft Exchange Server Deserialization of Untrusted Data (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-23277 and fix it if it is affected.

What it is: CVE-2022-23277 is a high-severity code injection vulnerability in Microsoft Exchange Server, published on 9 Mar 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-23277 exists.

Affected product: Microsoft Exchange Server. 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-2022-23277/ (Markdown: https://insights.sbomify.com/CVE-2022-23277/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-23277
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-23277
- OSV: https://osv.dev/vulnerability/CVE-2022-23277

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-23277/
Summaries are generated and may contain mistakes; the official description above is the record.