CVE-2026-20320
Updated
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.8% (58th pct)
- CISA KEV
- Exploited
- Published
- 2026-08-19
- Weakness
- CWE-611
Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA notes
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.
Key Findings
as of 2026-11-12- CISA added CVE-2026-20320 to the KEV catalog 83 days after its CVE record was published. The median for entries added in 2026 so far is 12 days.
- It is one of 103 Cisco entries in the CISA KEV catalog, and one of 21 added in 2026.
- Its current EPSS score (0.8%) is higher than that of 2% of CISA KEV entries.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NOpen in CVSS calculator Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Cisco Cisco BroadWorks | N/A |
References
1 linksOther references
Record Details
- Published
- 2026-08-19
- Last updated
- 2026-11-11
- Assigner (CNA)
- cisco
- Credited to
- -
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