# CVE-2026-20035: Cisco Unity Connection Server-Side Request Forgery Vulnerability

> Unauthenticated attackers can exploit improper input validation in the Web Inbox to send arbitrary network requests from the affected device.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 May 2026
- **Updated:** 6 May 2026
- **Also known as:** GHSA-w7jh-xmq5-2m7v

## What is CVE-2026-20035?

CVE-2026-20035 is a high-severity server-side request forgery vulnerability in Cisco Unity Connection, published on 6 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the web UI of Cisco Unity Connection Web Inbox could allow an unauthenticated, remote attacker to conduct SSRF attacks through an affected device.

This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to send arbitrary network requests that are sourced from the affected device.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-20035?

It affects 1 product.


Products: Cisco Unity Connection.

## How do I fix CVE-2026-20035?

No fix has been published for CVE-2026-20035 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20035 being exploited?

There is no known exploitation of CVE-2026-20035 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-2026-20034](https://insights.sbomify.com/CVE-2026-20034/): Cisco Unity Connection Remote Code Execution Vulnerability (high 8.8)
- [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)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20035 and fix it if it is affected.

What it is: CVE-2026-20035 is a high-severity server-side request forgery vulnerability in Cisco Unity Connection, published on 6 May 2026. 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-2026-20035 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-2026-20035/ (Markdown: https://insights.sbomify.com/CVE-2026-20035/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20035
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20035
- OSV: https://osv.dev/vulnerability/CVE-2026-20035

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-20035/
Summaries are generated and may contain mistakes; the official description above is the record.