# CVE-2022-21884: Local Security Authority Subsystem Service Elevation of Privilege Vulnerability

> An attacker can exploit a vulnerability in the Local Security Authority Subsystem Service to elevate privileges on Windows Server systems.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jan 2022
- **Updated:** 2 Jan 2025
- **Also known as:** GHSA-gfq7-g4rw-qmmx

## What is CVE-2022-21884?

CVE-2022-21884 is a high-severity vulnerability in Microsoft Windows Server, published on 11 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Local Security Authority Subsystem Service Elevation of Privilege Vulnerability

## Which versions are affected by CVE-2022-21884?

It affects 5 products.


Products: Microsoft Windows Server, Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019.

## How do I fix CVE-2022-21884?

No fix has been published for CVE-2022-21884 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-21884 being exploited?

There is no known exploitation of CVE-2022-21884 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows Server

- [CVE-2022-26937](https://insights.sbomify.com/CVE-2022-26937/): Windows Network File System Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2022-26932](https://insights.sbomify.com/CVE-2022-26932/): Storage Spaces Direct Elevation of Privilege Vulnerability (high 8.2)
- [CVE-2022-21910](https://insights.sbomify.com/CVE-2022-21910/): Microsoft Cluster Port Driver Elevation of Privilege Vulnerability (high 7.8)
- [CVE-2021-42282](https://insights.sbomify.com/CVE-2021-42282/): Active Directory Domain Services Elevation of Privilege Vulnerability (high 7.5)
- [CVE-2021-42291](https://insights.sbomify.com/CVE-2021-42291/): Active Directory Domain Services Elevation of Privilege Vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-21884 and fix it if it is affected.

What it is: CVE-2022-21884 is a high-severity vulnerability in Microsoft Windows Server, published on 11 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-21884 in the wild and no public exploit code.

Affected product: Microsoft Windows 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-2022-21884/ (Markdown: https://insights.sbomify.com/CVE-2022-21884/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-21884
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-21884
- OSV: https://osv.dev/vulnerability/CVE-2022-21884

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-21884/
Summaries are generated and may contain mistakes; the official description above is the record.