# CVE-2026-20109: Cisco Packaged Contact Center Enterprise and Cisco Unified Contact Center Enterprise Cross-Site Scripting Vulnerability

> Authenticated attackers can inject malicious scripts into the Cisco Contact Center web interface, potentially executing code or stealing browser data.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Jan 2026
- **Updated:** 21 Jan 2026
- **Also known as:** GHSA-q8j8-jmww-v8g6

## What is CVE-2026-20109?

CVE-2026-20109 is a medium-severity cross-site scripting vulnerability in Cisco Packaged Contact Center Enterprise, published on 21 Jan 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Multiple vulnerabilities in the web-based management interface of Cisco Packaged Contact Center Enterprise (Packaged CCE) and Cisco Unified Contact Center Enterprise (Unified CCE) could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device. 

These vulnerabilities exist because the web-based management interface does not properly validate user-supplied input. An attacker could exploit these vulnerabilities by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit these vulnerabilities, the attacker must have valid administrative credentials.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-20109?


## How do I fix CVE-2026-20109?

No fix has been published for CVE-2026-20109 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20109 being exploited?

There is no known exploitation of CVE-2026-20109 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20109 and fix it if it is affected.

What it is: CVE-2026-20109 is a medium-severity cross-site scripting vulnerability in Cisco Packaged Contact Center Enterprise, published on 21 Jan 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-20109 in the wild and no public exploit code.

Affected product: Cisco Packaged Contact Center Enterprise. 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-2026-20109/ (Markdown: https://insights.sbomify.com/CVE-2026-20109/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20109
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20109
- OSV: https://osv.dev/vulnerability/CVE-2026-20109

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-20109/
Summaries are generated and may contain mistakes; the official description above is the record.