# CVE-2017-3831: Auth bypass in Cisco Mobility Express 1800 Access Point Series

> Unauthenticated remote attackers can bypass authentication on Cisco Mobility Express Access Points to gain full administrator privileges and modify configurations.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:** 15 Mar 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-p3g2-f65q-g6rx

## What is CVE-2017-3831?

CVE-2017-3831 is a critical authentication bypass vulnerability in Cisco Mobility Express 1800 Access Point Series, published on 15 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the web-based GUI of Cisco Mobility Express 1800 Series Access Points could allow an unauthenticated, remote attacker to bypass authentication. The attacker could be granted full administrator privileges. The vulnerability is due to improper implementation of authentication for accessing certain web pages using the GUI interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web interface of the affected system. A successful exploit could allow the attacker to bypass authentication and perform unauthorized configuration changes or issue control commands to the affected device. This vulnerability affects Cisco Mobility Express 1800 Series Access Points running a software version prior to 8.2.110.0. Cisco Bug IDs: CSCuy68219.

Weakness: CWE-287 (Improper Authentication), CWE-264

## Which versions are affected by CVE-2017-3831?

It affects 1 product.


Products: Cisco Aironet Access Point Software.

## How do I fix CVE-2017-3831?

No fix has been published for CVE-2017-3831 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-3831 being exploited?

There is no known exploitation of CVE-2017-3831 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Mobility Express 1800 Access Point Series

- [CVE-2022-20622](https://insights.sbomify.com/CVE-2022-20622/): Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability (high 8.6)
- [CVE-2018-0234](https://insights.sbomify.com/CVE-2018-0234/): Denial of service in Cisco Aironet 1810, 1830, and 1850 Series Access Points (high 8.6)
- [CVE-2016-1419](https://insights.sbomify.com/CVE-2016-1419/): Denial of service in n/a (high 8.1)
- [CVE-2016-6362](https://insights.sbomify.com/CVE-2016-6362/): Privilege escalation in n/a (high 7.8)
- [CVE-2015-6367](https://insights.sbomify.com/CVE-2015-6367/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-3831 and fix it if it is affected.

What it is: CVE-2017-3831 is a critical authentication bypass vulnerability in Cisco Mobility Express 1800 Access Point Series, published on 15 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-3831 in the wild and no public exploit code.

Affected product: Cisco Mobility Express 1800 Access Point Series. 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-2017-3831/ (Markdown: https://insights.sbomify.com/CVE-2017-3831/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-3831
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-3831
- OSV: https://osv.dev/vulnerability/CVE-2017-3831

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-3831/
Summaries are generated and may contain mistakes; the official description above is the record.