# CVE-2023-28252: Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation

> An attacker can exploit a memory corruption flaw in the Windows Common Log File System Driver to gain elevated privileges on the system.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C`)
- **Exploited in the wild:** Yes, since 11 Apr 2023 (CISA KEV), used in ransomware
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Apr 2023
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-385j-3gwh-pjgr

## What is CVE-2023-28252?

CVE-2023-28252 is a high-severity memory corruption vulnerability in Microsoft Windows 10 1507, published on 11 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2023-28252?

It affects 13 products.


Products: Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 20h2, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 21h2, Microsoft Windows 11 22h2, Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022.

## How do I fix CVE-2023-28252?

No fix has been published for CVE-2023-28252 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 2 May 2023.

## Is CVE-2023-28252 being exploited?

Yes. Attackers have exploited CVE-2023-28252 in the wild since at least 11 Apr 2023, including in ransomware campaigns.

Public exploit code:

- https://github.com/fortra/CVE-2023-28252 (github_poc): https://github.com/fortra/CVE-2023-28252
- A modification to fortra's CVE-2023-28252 exploit, compiled to exe (github_poc): https://github.com/duck-sec/CVE-2023-28252-Compiled-exe
- it's a CVE-2023-28252 (Patched), but feel free to use it for check any outdated software or reseach (github_poc): https://github.com/byt3n33dl3/CLFS
- The repo contains a precompiled binary which can be run on a Windows machine vulnerable to CVE-2023-28252 (github_poc): https://github.com/bkstephen/Compiled-PoC-Binary-For-CVE-2023-28252
- Windows Common Log File System Driver (clfs.sys) Elevation of Privilege Vulnerability (metasploit)
- https://github.com/726232111/CVE-2023-28252 (github_poc): https://github.com/726232111/CVE-2023-28252

## Other vulnerabilities in Microsoft Windows 10 1507

- [CVE-2017-8543](https://insights.sbomify.com/CVE-2017-8543/): Microsoft Windows Search Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2025-33053](https://insights.sbomify.com/CVE-2025-33053/): Microsoft Windows External Control of File Name or Path (high 8.8, exploited in the wild)
- [CVE-2025-33073](https://insights.sbomify.com/CVE-2025-33073/): Microsoft Windows SMB Client Improper Access Control (high 8.8, exploited in the wild)
- [CVE-2024-49039](https://insights.sbomify.com/CVE-2024-49039/): Microsoft Windows Task Scheduler Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2024-43461](https://insights.sbomify.com/CVE-2024-43461/): Microsoft Windows MSHTML Platform Spoofing (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-28252 and fix it if it is affected.

What it is: CVE-2023-28252 is a high-severity memory corruption vulnerability in Microsoft Windows 10 1507, published on 11 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2023-28252 in the wild since at least 11 Apr 2023, including in ransomware campaigns.

Affected product: Microsoft Windows 10 1507. 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-2023-28252/ (Markdown: https://insights.sbomify.com/CVE-2023-28252/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-28252
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-28252
- OSV: https://osv.dev/vulnerability/CVE-2023-28252

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-28252/
Summaries are generated and may contain mistakes; the official description above is the record.