HIGH · CVSS 7.5
ACTIVELY EXPLOITED
PATCH AVAILABLE
CVE-2026-20320: Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability
| Vendor | Cisco |
|---|---|
| Product | BroadWorks |
| CVSS score | 7.5 · CVSS 3.1 · HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| EPSS | 0.4% (percentile 33) |
| Actively exploited | Yes |
| Added to CISA KEV | 10 Nov 2026 |
| CISA federal deadline | 24 Nov 2026 |
| Weakness (CWE) | CWE-611 |
| NVD published | 19 Aug 2026 |
| NVD last modified | 11 Nov 2026 |
| NVD status | Analyzed |
Affected versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Broadworks Application Delivery Platform | before ri.2026.07 | ri.2026.07 |
| Cisco Broadworks Application Server | before 2026.0 | 2026.0 |
| Cisco Broadworks Profile Server | before 2026.07 | 2026.07 |
| Cisco Broadworks Xtended Services Platform | before 2026.07 | 2026.07 |
Required action (CISA's text)
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Description (NVD)
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.
SOURCES
Other Cisco flaws
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- CVE-2026-76519: Cisco Secure Email Gateway Relative Path Traversal Vulnerability
- CVE-2026-76504: Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability
- CVE-2026-76460: Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
- CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 11 Nov 2026.