# CVE-2021-37315: Path traversal in n/a

> Remote attackers can write arbitrary files to ASUS RT-AC68U routers via improper sanitation in Cloud Disk COPY and MOVE operations.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Feb 2023
- **Updated:** 26 Mar 2025
- **Also known as:** GHSA-2gmp-hjmm-v2wx

## What is CVE-2021-37315?

CVE-2021-37315 is a critical path traversal vulnerability in n/a, published on 3 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Incorrect Access Control issue discoverd in Cloud Disk in ASUS RT-AC68U router firmware version before 3.0.0.4.386.41634 allows remote attackers to write arbitrary files via improper sanitation on the source for COPY and MOVE operations.

Weakness: CWE-706 (Use of Incorrectly-Resolved Name or Reference)

## Which versions are affected by CVE-2021-37315?

It affects 1 product.


Products: Asus Rt-Ac68u Firmware.

## How do I fix CVE-2021-37315?

No fix has been published for CVE-2021-37315 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-37315 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-37315 exists.

## Other vulnerabilities in n/a

- [CVE-2021-37317](https://insights.sbomify.com/CVE-2021-37317/): Path traversal in n/a (critical 9.1)
- [CVE-2021-37316](https://insights.sbomify.com/CVE-2021-37316/): SQL injection in n/a (high 7.5)
- [CVE-2021-45757](https://insights.sbomify.com/CVE-2021-45757/): Memory corruption in n/a (high 7.5)
- [CVE-2018-0582](https://insights.sbomify.com/CVE-2018-0582/): Cross-site scripting in RT-AC68U (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-37315 and fix it if it is affected.

What it is: CVE-2021-37315 is a critical path traversal vulnerability in n/a, published on 3 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-37315 exists.

Affected product: n/a. 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-2021-37315/ (Markdown: https://insights.sbomify.com/CVE-2021-37315/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-37315
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-37315
- OSV: https://osv.dev/vulnerability/CVE-2021-37315

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-37315/
Summaries are generated and may contain mistakes; the official description above is the record.