# CVE-2026-20034: Cisco Unity Connection Remote Code Execution Vulnerability

> Authenticated attackers can execute arbitrary code as root via crafted API requests in Cisco Unity Connection, leading to full device compromise.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 6 May 2026
- **Updated:** 7 May 2026
- **Also known as:** GHSA-wfvp-xw34-rhwq

## What is CVE-2026-20034?

CVE-2026-20034 is a high-severity code injection vulnerability in Cisco Unity Connection, published on 6 May 2026. 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 Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of a targeted device. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.

Weakness: CWE-35 (Path Traversal: '.../...//')

## Which versions are affected by CVE-2026-20034?

It affects 1 product.


Products: Cisco Unity Connection.

## How do I fix CVE-2026-20034?

No fix has been published for CVE-2026-20034 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20034 being exploited?

There is no known exploitation of CVE-2026-20034 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Unity Connection

- [CVE-2014-3333](https://insights.sbomify.com/CVE-2014-3333/): Privilege escalation in n/a (critical 9.0)
- [CVE-2012-0366](https://insights.sbomify.com/CVE-2012-0366/): Privilege escalation in n/a (critical 9.0)
- [CVE-2012-3060](https://insights.sbomify.com/CVE-2012-3060/): Denial of service in n/a (high 7.8)
- [CVE-2012-0367](https://insights.sbomify.com/CVE-2012-0367/): Denial of service in n/a (high 7.8)
- [CVE-2024-20272](https://insights.sbomify.com/CVE-2024-20272/): File upload in Cisco Unity Connection (high 7.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20034 and fix it if it is affected.

What it is: CVE-2026-20034 is a high-severity code injection vulnerability in Cisco Unity Connection, published on 6 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-20034 in the wild and no public exploit code.

Affected product: Cisco Unity Connection. 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-2026-20034/ (Markdown: https://insights.sbomify.com/CVE-2026-20034/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20034
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20034
- OSV: https://osv.dev/vulnerability/CVE-2026-20034

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-20034/
Summaries are generated and may contain mistakes; the official description above is the record.