Cisco Unified Communications Products Security Hardening Release: October 2026
cisco-sa-voice-hardening-twgbH9e3
Summary
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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Security Impact Rating: High CVE: CVE-2026-20320
Products covered
A separate affected-products list was not included in the collected bulletin.
Remediation
Cisco has released software updates that address this vulnerability.
CVEs in this advisory 1
Updates
- Published by Cisco
The publication date reported by the vendor.
- Added to SecurityAlert
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- Confirmed at the source
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