pwned.coffeeOrder ticket · today's special · 10 Nov 2026

🔥 On the fly · exploited in the wildUS federal deadline 2026-11-24Scalding · 540°ChighOn hold · status unknown

Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability

Cisco BroadWorks

Cisco BroadWorks contains an improper restriction of XML external entity reference vulnerability that could allow an unauthenticated, remote attacker to read sensitive configuration information on an affected system. Added to CISA KEV on 2026-11-10 (federal deadline 2026-11-24).

Binds US federal agencies under CISA BOD 26-04.

Do this now

Check Cisco's advisory for a BroadWorks fix and restrict access to it now.

Who should check: teams running VPN & firewalls

First seen: 10 Nov 2026
Last update: 12 Nov 2026, 18:17 UTC
Identifiers: CVE-2026-20320
CVSS: 7.5
KEV deadline: 2026-11-24
Source: CISA KEV
On the menu as: VPN & firewalls

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability
Severity: high, exploited in the wild. Patch status: fix status unknown.
Affected: Cisco BroadWorks
Ids: CVE-2026-20320

Cisco BroadWorks contains an improper restriction of XML external entity reference vulnerability that could allow an unauthenticated, remote attacker to read sensitive configuration information on an affected system. Added to CISA KEV on 2026-11-10 (federal deadline 2026-11-24).

## Steps
1. This touches infrastructure (vpn-edge). Look in terraform, ansible, cloud-init, Dockerfiles and docs for the product and version we run. If it isn't in the repo, say so and list what a human should check on the box.
2. No source names a fix yet; check the vendor advisory. Until one ships: restrict network access to it.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-20320") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://nvd.nist.gov/vuln/detail/CVE-2026-20320 https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bworks-xxe-uwUd7CEt https://thehackernews.com/2026/11/cisco-broadworks-and-openwave-flaws.html https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bworks-xxe-uwUd7CEt?vs_f=Cisco%20Security%20Advisory%26vs_cat=Security%20Intelligence%26vs_type=RSS%26vs_p=Cisco%20BroadWorks%20Out-of-Band%20Blind%20XML%20External%20Entity%20Injection%20Vulnerability%26vs_k=1
https://pwned.coffee/i/cisco-broadworks-improper-restriction-of-xml-external-en-cve-2026-20320

Timeline

12 Nov 2026, 18:17 UTC
Reported by sec.cloudapps.cisco.com: Cisco BroadWorks Out-of-Band Blind XML External Entity Injection Vulnerability
11 Nov 2026, 06:17 UTC
Reported by thehackernews.com: Cisco BroadWorks and Openwave Flaws Actively Exploited Despite Available Patches
10 Nov 2026
First reported.

Receipt

Exploitation: Exploited: listed in CISA KEV
CISA KEV “CVE-2026-20320 added to CISA KEV on 2026-11-10, federal deadline 2026-11-24.” source
Overheard “Cisco BroadWorks and Openwave Flaws Actively Exploited Despite Available Patches.” source
Score: CVSS 7.5 (high). CVSS 3.1 7.5 (CNA cisco) for CVE-2026-20320
Last checked: 13 Nov 2026, 16:26 UTC

Sources: KEV ✓ CVE record ✓ Vendor ✓

Sources

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