# CVE-2024-21397: Microsoft Azure File Sync Elevation of Privilege Vulnerability

> An attacker can exploit a path traversal flaw in Azure File Sync to elevate privileges within the system.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L/E:P/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:** 13 Feb 2024
- **Updated:** 10 Aug 2026
- **Also known as:** GHSA-77qj-g9f7-xqj9

## What is CVE-2024-21397?

CVE-2024-21397 is a medium-severity path traversal vulnerability in Microsoft Azure File Sync, published on 13 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Microsoft Azure File Sync Elevation of Privilege Vulnerability

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

## Which versions are affected by CVE-2024-21397?

It affects 1 product.


Products: Microsoft Azure File Sync.

## How do I fix CVE-2024-21397?

No fix has been published for CVE-2024-21397 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-21397 being exploited?

There is no known exploitation of CVE-2024-21397 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Azure File Sync

- [CVE-2025-53729](https://insights.sbomify.com/CVE-2025-53729/): Microsoft Azure File Sync Elevation of Privilege Vulnerability (high 7.8)
- [CVE-2025-29973](https://insights.sbomify.com/CVE-2025-29973/): Microsoft Azure File Sync Elevation of Privilege Vulnerability (high 7.0)
- [CVE-2024-35253](https://insights.sbomify.com/CVE-2024-35253/): Microsoft Azure File Sync Elevation of Privilege Vulnerability (medium 4.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-21397 and fix it if it is affected.

What it is: CVE-2024-21397 is a medium-severity path traversal vulnerability in Microsoft Azure File Sync, published on 13 Feb 2024. 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-2024-21397 in the wild and no public exploit code.

Affected product: Microsoft Azure File Sync. 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-2024-21397/ (Markdown: https://insights.sbomify.com/CVE-2024-21397/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-21397
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-21397
- OSV: https://osv.dev/vulnerability/CVE-2024-21397

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-21397/
Summaries are generated and may contain mistakes; the official description above is the record.