CVE-2026-20320Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability
Known exploited — Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability
CISA confirmed this vulnerability is used in real attacks on 10.11.2026. Remediation deadline for US federal agencies: 24.11.2026.
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
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| cisco | broadworks application delivery platform | < ri.2026.07 | |
| cisco | broadworks application server | < 2026.0 | |
| cisco | broadworks profile server | < 2026.07 | |
| cisco | broadworks xtended services platform | < 2026.07 | |
| Cisco | Cisco BroadWorks | N/A |
References and patches
- cisco-sa-bworks-xxe-uwUd7CEt Vendor Advisory
- https://malbearlabs.com/posts/operation-snowball-inside-an-autonomous-ai-intrusion-campaign ExploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20320 US Government Resource
CPE matches (NVD) (4)
cpe:2.3:a:cisco:broadworks_application_delivery_platform:*:*:*:*:*:*:*:*< ri.2026.07cpe:2.3:a:cisco:broadworks_application_server:*:*:*:*:release_independent:*:*:*< 2026.0cpe:2.3:a:cisco:broadworks_profile_server:*:*:*:*:release_independent:*:*:*< 2026.07cpe:2.3:a:cisco:broadworks_xtended_services_platform:*:*:*:*:release_independent:*:*:*< 2026.07