Cisco · BroadWorks
CVE-2026-20320
Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability
概要
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: 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.
対処法
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.
米国連邦機関の対応期限：2026年11月24日
Ciscoのその他の悪用された脆弱性
| 追加日 | 脆弱性 | 製品 | 深刻度 | 攻撃の可能性 |
|---|---|---|---|---|
| 2026/10/29 | Unchecked Return Value to NULL Pointer Dereference | Secure Firewall ASA Software and Cisco Secure FTD Software | 高 8.6 | 0.8% |
| 2026/10/14 | Relative Path Traversal | Secure Email Gateway | 緊急 9.8 | 6.2% |
| 2026/09/30 | Hex Encoding | Catalyst SD-WAN Manager | 緊急 9.8 | 39% |
| 2026/09/16 | Incorrect Use of Privileged APIs | Identity Services Engine | 緊急 10.0 | 76% |
| 2026/09/14 | SQL Injection | Secure Email Gateway | 緊急 9.8 | 40% |
| 2026/09/09 | Firewall Management Center Authentication Bypass Using an Alternate Path or Channel | Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | 緊急 10.0 | 89% |
| 2026/08/11 | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) | 高 8.6 | 1.0% |
| 2026/07/29 | Secure Firewall Management Center Use of Hard-coded Password | Secure Firewall Management Center (FMC) | 中 5.3 | 35% |
出典：Known Exploited Vulnerabilities（CISA、パブリックドメイン）、CVE records（cve.org）、EPSS（FIRST）。攻撃の可能性は、今後30日以内に誰かがその脆弱性の悪用を試みるというEPSSの推定値です。