# CVE-2021-34762: Cisco Firepower Management Center Software Authenticated Directory Traversal Vulnerability

> Authenticated attackers can read or write arbitrary files on Cisco Firepower Management Center devices via crafted HTTPS requests.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Oct 2021
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-8m4x-wmgm-h3w9

## What is CVE-2021-34762?

CVE-2021-34762 is a high-severity path traversal vulnerability in Cisco Secure Firewall Threat Defense, published on 27 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), CWE-26 (Path Traversal: '/dir/../filename')

## Which versions are affected by CVE-2021-34762?

It affects 3 products.


Products: Cisco Firepower Management Center Virtual Appliance, Cisco Secure Firewall Threat Defense, Cisco Sourcefire Defense Center.

## How do I fix CVE-2021-34762?

No fix has been published for CVE-2021-34762 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-34762 being exploited?

There is no known exploitation of CVE-2021-34762 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Secure Firewall Threat Defense

- [CVE-2021-34781](https://insights.sbomify.com/CVE-2021-34781/): Cisco Firepower Threat Defense Software SSH Connections Denial of Service Vulnerability (high 8.6)
- [CVE-2021-34755](https://insights.sbomify.com/CVE-2021-34755/): Cisco Firepower Threat Defense Software Command Injection Vulnerabilities (medium 6.7)
- [CVE-2021-34756](https://insights.sbomify.com/CVE-2021-34756/): Cisco Firepower Threat Defense Software Command Injection Vulnerabilities (medium 6.7)
- [CVE-2021-34763](https://insights.sbomify.com/CVE-2021-34763/): Cisco Firepower Management Center Software Cross-Site Scripting and Open Redirect Vulnerabilities (medium 4.8)
- [CVE-2021-34764](https://insights.sbomify.com/CVE-2021-34764/): Cisco Firepower Management Center Software Cross-Site Scripting and Open Redirect Vulnerabilities (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-34762 and fix it if it is affected.

What it is: CVE-2021-34762 is a high-severity path traversal vulnerability in Cisco Secure Firewall Threat Defense, published on 27 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-34762 in the wild and no public exploit code.

Affected product: Cisco Secure Firewall Threat Defense. 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-2021-34762/ (Markdown: https://insights.sbomify.com/CVE-2021-34762/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-34762
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-34762
- OSV: https://osv.dev/vulnerability/CVE-2021-34762

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-34762/
Summaries are generated and may contain mistakes; the official description above is the record.