# CVE-2026-20320: XML external entity in Cisco BroadWorks

> Unauthenticated remote attackers can read sensitive configuration files via XML external entity injection in the OCI-P service.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:** 19 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-9w8j-fg77-whw7

## What is CVE-2026-20320?

CVE-2026-20320 is a high-severity vulnerability in Cisco BroadWorks, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Open Client Interface (OCI) XML Parser of Cisco BroadWorks could allow an unauthenticated, remote attacker to read sensitive configuration information on an affected system.

 This vulnerability exists because XML entries are improperly parsed due to external entity resolution being allowed by default. An attacker could exploit this vulnerability by sending a crafted XML message to the Open Client Interface – Provisioning (OCI-P) service. A successful exploit could allow the attacker to view sensitive files from the filesystem with the privileges of the Cisco BroadWorks user.

Weakness: CWE-611 (Improper Restriction of XML External Entity Reference)

## Which versions are affected by CVE-2026-20320?


## How do I fix CVE-2026-20320?

No fix has been published for CVE-2026-20320 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-20320 being exploited?

There is no known exploitation of CVE-2026-20320 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-20320 and fix it if it is affected.

What it is: CVE-2026-20320 is a high-severity vulnerability in Cisco BroadWorks, published on 19 Aug 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-2026-20320 in the wild and no public exploit code.

Affected product: Cisco BroadWorks. 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-2026-20320/ (Markdown: https://insights.sbomify.com/CVE-2026-20320/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-20320
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-20320
- OSV: https://osv.dev/vulnerability/CVE-2026-20320

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-20320/
Summaries are generated and may contain mistakes; the official description above is the record.