# CVE-2023-36391: Local Security Authority Subsystem Service Elevation of Privilege Vulnerability

> An attacker can exploit a vulnerability in the Local Security Authority Subsystem Service to gain elevated privileges on Windows 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:** 12 Dec 2023
- **Updated:** 1 Jan 2025
- **Also known as:** GHSA-q28x-8jvc-pp88

## What is CVE-2023-36391?

CVE-2023-36391 is a high-severity vulnerability in Microsoft Windows 11 23h2, published on 12 Dec 2023. 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

Weakness: CWE-59 (Improper Link Resolution Before File Access)

## Which versions are affected by CVE-2023-36391?

It affects 1 product.


Products: Microsoft Windows 11 23h2.

## How do I fix CVE-2023-36391?

No fix has been published for CVE-2023-36391 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-36391 being exploited?

There is no known exploitation of CVE-2023-36391 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows 11 23h2

- [CVE-2026-81963](https://insights.sbomify.com/CVE-2026-81963/): Microsoft Windows Link Following (high 7.8, exploited in the wild)
- [CVE-2026-100219](https://insights.sbomify.com/CVE-2026-100219/): Microsoft QUIC Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2026-96909](https://insights.sbomify.com/CVE-2026-96909/): Windows BitLocker Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2026-62815](https://insights.sbomify.com/CVE-2026-62815/): Microsoft QUIC Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2026-45657](https://insights.sbomify.com/CVE-2026-45657/): Windows Kernel Remote Code Execution Vulnerability (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36391 and fix it if it is affected.

What it is: CVE-2023-36391 is a high-severity vulnerability in Microsoft Windows 11 23h2, published on 12 Dec 2023. 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-2023-36391 in the wild and no public exploit code.

Affected product: Microsoft Windows 11 23h2. 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-2023-36391/ (Markdown: https://insights.sbomify.com/CVE-2023-36391/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36391
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36391
- OSV: https://osv.dev/vulnerability/CVE-2023-36391

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36391/
Summaries are generated and may contain mistakes; the official description above is the record.