# CVE-2019-1854: Cisco Expressway Series Directory Traversal Vulnerability

> Authenticated attackers can bypass security restrictions to access associated Unified Communications Manager interfaces via directory traversal.

- **Severity:** Medium 4.1 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2019
- **Updated:** 21 Nov 2024
- **Also known as:** GHSA-r7gg-wq5p-qhgv

## What is CVE-2019-1854?

CVE-2019-1854 is a medium-severity path traversal vulnerability in Cisco Expressway, published on 3 May 2019. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability in the management web interface of Cisco Expressway Series could allow an authenticated, remote attacker to perform a directory traversal attack against an affected device. The vulnerability is due to insufficient input validation on the web interface. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web interface. A successful exploit could allow the attacker to bypass security restrictions and access the web interface of a Cisco Unified Communications Manager associated with the affected device. Valid credentials would still be required to access the Cisco Unified Communications Manager interface.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2019-1854?

It affects 1 product.


Products: Cisco Telepresence Video Communication Server.

## How do I fix CVE-2019-1854?

No fix has been published for CVE-2019-1854 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1854 being exploited?

There is no known exploitation of CVE-2019-1854 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Expressway

- [CVE-2023-20105](https://insights.sbomify.com/CVE-2023-20105/): Privilege escalation in Cisco TelePresence Video Communication Server (VCS) Expressway (critical 9.6)
- [CVE-2023-20192](https://insights.sbomify.com/CVE-2023-20192/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Privilege Escalation Vulnerabilities (critical 9.6)
- [CVE-2022-20754](https://insights.sbomify.com/CVE-2022-20754/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0)
- [CVE-2022-20755](https://insights.sbomify.com/CVE-2022-20755/): Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities (critical 9.0)
- [CVE-2016-1468](https://insights.sbomify.com/CVE-2016-1468/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1854 and fix it if it is affected.

What it is: CVE-2019-1854 is a medium-severity path traversal vulnerability in Cisco Expressway, published on 3 May 2019. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-1854 in the wild and no public exploit code.

Affected product: Cisco Expressway. 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-2019-1854/ (Markdown: https://insights.sbomify.com/CVE-2019-1854/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1854
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1854
- OSV: https://osv.dev/vulnerability/CVE-2019-1854

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1854/
Summaries are generated and may contain mistakes; the official description above is the record.