CVE Watch10 nov 2026

CVE-2026-20320

Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability

CVSS

7.5

Alto

EPSS

0.4%

p33

KEV

SÍ

10 nov 2026

Exploit Today

0-100

Publicado: 19 ago 2026 · Última mod.: 10 nov 2026 · CWE-611

EPSS · 30d

0.4%EPSS · 30 días0.5%

2026-10-132026-11-10

Ficha del catálogo KEV

Producto

Cisco / BroadWorks

Vulnerabilidad

Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability

Añadido a KEV

10 nov 2026

Remediar antes de

24 nov 2026

Uso conocido en ransomware

Descripción resumida

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.

Acción requerida

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.

Notas

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

Descripción técnica

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.

Referencias oficiales

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