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CVE-2026-20320 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. Thi...

HighCVSS 7.5 EPSS 0.82% CISA KEV added 2026-11-10 · due 2026-11-24 Exploited in the wild
Published
Updated
Exploit status
Exploited in the wild (confirmed)
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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.

CISA Known Exploited Vulnerability

Date added
2026-11-10
Due date (FCEB)
2026-11-24
Ransomware use
Unknown

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.

Affected products

ProductAffected versionsFixed in
Cisco BroadWorks All versions No fix listed
cisco broadworks application delivery platform < ri.2026.07 ri.2026.07
cisco broadworks application server < 2026.0 2026.0
cisco broadworks profile server < 2026.07 2026.07
cisco broadworks xtended services platform < 2026.07 2026.07

References