WhatCyber / CISA KEV catalog / CVE-2026-20320
CVE-2026-20320: Cisco BroadWorks
Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability
Actively exploited (CISA KEV) HIGH severity
Description
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.
Key facts
- CVSS v3
- 7.5 (HIGH)
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2026-08-19
- Last modified
- 2026-11-13
- NVD status
- Modified
- Added to CISA KEV
- 2026-11-10
- CISA due date
- 2026-11-24
Required action
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.
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bworks-xxe-uwUd7CEt ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20320
Weaknesses (CWE)
- CWE-611
Affected products
- cisco broadworks_application_delivery_platform
- cisco broadworks_application_server
- cisco broadworks_profile_server
- cisco broadworks_xtended_services_platform
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bworks-xxe-uwUd7CEt
- https://malbearlabs.com/posts/operation-snowball-inside-an-autonomous-ai-intrusion-campaign
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20320